From 58615f756d7aa957133b85dbbd1ab48562e7b413 Mon Sep 17 00:00:00 2001
From: Michael Barrett <mike182uk@gmail.com>
Date: Sat, 24 Aug 2019 10:02:47 +0100
Subject: [PATCH] upgrade standard

---
 index.js          |  36 +-
 package-lock.json | 969 +++++++++++++++++++++++++---------------------
 package.json      |   6 +-
 test.js           |   8 +-
 4 files changed, 548 insertions(+), 471 deletions(-)

diff --git a/index.js b/index.js
index 6f6ee8e..e1384a2 100644
--- a/index.js
+++ b/index.js
@@ -38,18 +38,18 @@ const UNIT_MAP = {
 /**
  * Parse a timestring
  *
- * @param  {String} string
- * @param  {String} returnUnit
- * @param  {Object} opts
- * @return {Number}
+ * @param   {string} string
+ * @param   {string} returnUnit
+ * @param   {Object} opts
+ * @returns {number}
  */
 
 function parseTimestring (string, returnUnit, opts) {
   opts = Object.assign({}, DEFAULT_OPTS, opts || {})
 
   let totalSeconds = 0
-  let unitValues = getUnitValues(opts)
-  let groups = string
+  const unitValues = getUnitValues(opts)
+  const groups = string
     .toLowerCase()
     .replace(/[^.\w+-]+/g, '')
     .match(/[-+]?[0-9.]+[a-z]+/g)
@@ -59,8 +59,8 @@ function parseTimestring (string, returnUnit, opts) {
   }
 
   groups.forEach(group => {
-    let value = group.match(/[0-9.]+/g)[0]
-    let unit = group.match(/[a-z]+/g)[0]
+    const value = group.match(/[0-9.]+/g)[0]
+    const unit = group.match(/[a-z]+/g)[0]
 
     totalSeconds += getSeconds(value, unit, unitValues)
   })
@@ -80,7 +80,7 @@ function parseTimestring (string, returnUnit, opts) {
  */
 
 function getUnitValues (opts) {
-  let unitValues = {
+  const unitValues = {
     ms: 0.001,
     s: 1,
     m: 60,
@@ -98,12 +98,12 @@ function getUnitValues (opts) {
 /**
  * Get the key for a unit
  *
- * @param   {String} unit
- * @returns {String}
+ * @param   {string} unit
+ * @returns {string}
  */
 
 function getUnitKey (unit) {
-  for (let key of Object.keys(UNIT_MAP)) {
+  for (const key of Object.keys(UNIT_MAP)) {
     if (UNIT_MAP[key].indexOf(unit) > -1) {
       return key
     }
@@ -115,10 +115,10 @@ function getUnitKey (unit) {
 /**
  *  Get the number of seconds for a value, based on the unit
  *
- * @param   {Number} value
- * @param   {String} unit
+ * @param   {number} value
+ * @param   {string} unit
  * @param   {Object} unitValues
- * @returns {Number}
+ * @returns {number}
  */
 
 function getSeconds (value, unit, unitValues) {
@@ -128,10 +128,10 @@ function getSeconds (value, unit, unitValues) {
 /**
  * Convert a value from its existing unit to a new unit
  *
- * @param   {Number} value
- * @param   {String} unit
+ * @param   {number} value
+ * @param   {string} unit
  * @param   {Object} unitValues
- * @returns {Number}
+ * @returns {number}
  */
 
 function convert (value, unit, unitValues) {
diff --git a/package-lock.json b/package-lock.json
index b913d29..97b836c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,26 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
+      "integrity": "sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQag/ztrBC7wegWoQ1nLREPVSKSW8byhTlzTKyNE4ifaTA6lCp7JjpFw==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.0.0"
+      }
+    },
+    "@babel/highlight": {
+      "version": "7.5.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.5.0.tgz",
+      "integrity": "sha512-7dV4eu9gBxoM0dAnj/BCFDW9LFU0zvTrkq0ugM7pnHEgguOEeOz1so2ZghEdzviYzQEED0r4EAgpsBChKy1TRQ==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      }
+    },
     "abbrev": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.9.tgz",
@@ -11,15 +31,15 @@
       "dev": true
     },
     "acorn": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.0.0.tgz",
+      "integrity": "sha512-PaF/MduxijYYt7unVGRuds1vBC9bFxbNf+VWqhOClfdgy7RlVkQqt610ig1/yxTgsDIfW1cWDel5EBbOy3jdtQ==",
       "dev": true
     },
     "acorn-jsx": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
-      "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.2.tgz",
+      "integrity": "sha512-tiNTrP1MP0QrChmD2DdupCr6HWSFeKVw5d/dHTu4Y7rkAkRhU/Dt7dphAfIUyxtHpl/eBVip5uTNSpQJHylpAw==",
       "dev": true
     },
     "ajv": {
@@ -34,12 +54,6 @@
         "uri-js": "^4.2.2"
       }
     },
-    "ajv-keywords": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.4.0.tgz",
-      "integrity": "sha512-aUjdRFISbuFOl0EIZc+9e4FfZp0bDZgAdOOf30bJmw8VM9v84SHyVyxDfbWxpGYbdZD/9XoKxfHVNmxPkhwyGw==",
-      "dev": true
-    },
     "amdefine": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
@@ -114,6 +128,12 @@
       "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
       "dev": true
     },
+    "astral-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
+      "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
+      "dev": true
+    },
     "async": {
       "version": "1.5.2",
       "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
@@ -138,59 +158,6 @@
       "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
       "dev": true
     },
-    "babel-code-frame": {
-      "version": "6.26.0",
-      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
-      "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
-      "dev": true,
-      "requires": {
-        "chalk": "^1.1.3",
-        "esutils": "^2.0.2",
-        "js-tokens": "^3.0.2"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true
-        },
-        "ansi-styles": {
-          "version": "2.2.1",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
-          "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-          "dev": true
-        },
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true,
-          "requires": {
-            "ansi-styles": "^2.2.1",
-            "escape-string-regexp": "^1.0.2",
-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "3.0.1",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
-          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^2.0.0"
-          }
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -222,19 +189,10 @@
       "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
       "dev": true
     },
-    "caller-path": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/caller-path/-/caller-path-0.1.0.tgz",
-      "integrity": "sha1-lAhe9jWB7NPaqSREqP6U6CV3dR8=",
-      "dev": true,
-      "requires": {
-        "callsites": "^0.2.0"
-      }
-    },
     "callsites": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/callsites/-/callsites-0.2.0.tgz",
-      "integrity": "sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
+      "integrity": "sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==",
       "dev": true
     },
     "camelcase": {
@@ -292,9 +250,9 @@
       }
     },
     "chardet": {
-      "version": "0.4.2",
-      "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.4.2.tgz",
-      "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.7.0.tgz",
+      "integrity": "sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==",
       "dev": true
     },
     "check-error": {
@@ -303,12 +261,6 @@
       "integrity": "sha1-V00xLt2Iu13YkS6Sht1sCu1KrII=",
       "dev": true
     },
-    "circular-json": {
-      "version": "0.3.3",
-      "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.3.3.tgz",
-      "integrity": "sha512-UZK3NBx2Mca+b5LsG7bY183pHWt5Y1xts4P3Pz7ENTwGVnJOUWbRb3ocjvX7hx9tq/yTAdclXm9sZ38gNuem4A==",
-      "dev": true
-    },
     "cli-cursor": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
@@ -357,9 +309,9 @@
       "dev": true
     },
     "combined-stream": {
-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
-      "integrity": "sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==",
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
       "dev": true,
       "requires": {
         "delayed-stream": "~1.0.0"
@@ -384,13 +336,13 @@
       "dev": true
     },
     "coveralls": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.3.tgz",
-      "integrity": "sha512-viNfeGlda2zJr8Gj1zqXpDMRjw9uM54p7wzZdvLRyOgnAfCe974Dq4veZkjJdxQXbmdppu6flEajFYseHYaUhg==",
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.6.tgz",
+      "integrity": "sha512-Pgh4v3gCI4T/9VijVrm8Ym5v0OgjvGLKj3zTUwkvsCiwqae/p6VLzpsFNjQS2i6ewV7ef+DjFJ5TSKxYt/mCrA==",
       "dev": true,
       "requires": {
         "growl": "~> 1.10.0",
-        "js-yaml": "^3.11.0",
+        "js-yaml": "^3.13.1",
         "lcov-parse": "^0.0.10",
         "log-driver": "^1.2.7",
         "minimist": "^1.2.0",
@@ -465,23 +417,23 @@
       }
     },
     "deglob": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/deglob/-/deglob-2.1.1.tgz",
-      "integrity": "sha512-2kjwuGGonL7gWE1XU4Fv79+vVzpoQCl0V+boMwWtOQJV2AGDabCwez++nB1Nli/8BabAfZQ/UuHPlp6AymKdWw==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/deglob/-/deglob-3.1.0.tgz",
+      "integrity": "sha512-al10l5QAYaM/PeuXkAr1Y9AQz0LCtWsnJG23pIgh44hDxHFOj36l6qvhfjnIWBYwZOqM1fXUFV9tkjL7JPdGvw==",
       "dev": true,
       "requires": {
         "find-root": "^1.0.0",
         "glob": "^7.0.5",
-        "ignore": "^3.0.9",
+        "ignore": "^5.0.0",
         "pkg-config": "^1.1.0",
         "run-parallel": "^1.1.2",
         "uniq": "^1.0.1"
       },
       "dependencies": {
         "glob": {
-          "version": "7.1.3",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
-          "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
+          "version": "7.1.4",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.4.tgz",
+          "integrity": "sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==",
           "dev": true,
           "requires": {
             "fs.realpath": "^1.0.0",
@@ -493,9 +445,9 @@
           }
         },
         "ignore": {
-          "version": "3.3.10",
-          "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.10.tgz",
-          "integrity": "sha512-Pgs951kaMm5GXP7MOvxERINe3gsaVjUWFm+UZPSq9xYriQAksyhg0csnS0KXSNRD5NmNdapXEpjxG49+AKh/ug==",
+          "version": "5.1.4",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.1.4.tgz",
+          "integrity": "sha512-MzbUSahkTW1u7JpKKjY7LCARd1fU5W2rLdxlM4kdkayuCwZImjkpluF9CM1aLewYJguPDqewLam18Y6AU69A8A==",
           "dev": true
         }
       }
@@ -513,9 +465,9 @@
       "dev": true
     },
     "doctrine": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-2.1.0.tgz",
-      "integrity": "sha512-35mSku4ZXK0vfCuHEDAwt55dg2jNajHZ1odvF+8SSr82EsZY4QmXfuWso8oEd8zRhVObSN18aM0CjSdoBX7zIw==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
+      "integrity": "sha512-yS+Q5i3hBf7GBkd4KG8a7eBNNWNGLTaEwwYWUijIYM7zrlYDM0BFXHjjPWlWZ1Rg7UaddZeIDmi9jF3HmqiQ2w==",
       "dev": true,
       "requires": {
         "esutils": "^2.0.2"
@@ -608,77 +560,98 @@
       }
     },
     "eslint": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.4.0.tgz",
-      "integrity": "sha512-UIpL91XGex3qtL6qwyCQJar2j3osKxK9e3ano3OcGEIRM4oWIpCkDg9x95AXEC2wMs7PnxzOkPZ2gq+tsMS9yg==",
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-6.1.0.tgz",
+      "integrity": "sha512-QhrbdRD7ofuV09IuE2ySWBz0FyXCq0rriLTZXZqaWSI79CVtHVRdkFuFTViiqzZhkCgfOh9USpriuGN2gIpZDQ==",
       "dev": true,
       "requires": {
-        "ajv": "^6.5.0",
-        "babel-code-frame": "^6.26.0",
+        "@babel/code-frame": "^7.0.0",
+        "ajv": "^6.10.0",
         "chalk": "^2.1.0",
         "cross-spawn": "^6.0.5",
-        "debug": "^3.1.0",
-        "doctrine": "^2.1.0",
-        "eslint-scope": "^4.0.0",
+        "debug": "^4.0.1",
+        "doctrine": "^3.0.0",
+        "eslint-scope": "^5.0.0",
         "eslint-utils": "^1.3.1",
         "eslint-visitor-keys": "^1.0.0",
-        "espree": "^4.0.0",
+        "espree": "^6.0.0",
         "esquery": "^1.0.1",
         "esutils": "^2.0.2",
-        "file-entry-cache": "^2.0.0",
+        "file-entry-cache": "^5.0.1",
         "functional-red-black-tree": "^1.0.1",
-        "glob": "^7.1.2",
+        "glob-parent": "^5.0.0",
         "globals": "^11.7.0",
-        "ignore": "^4.0.2",
+        "ignore": "^4.0.6",
+        "import-fresh": "^3.0.0",
         "imurmurhash": "^0.1.4",
-        "inquirer": "^5.2.0",
-        "is-resolvable": "^1.1.0",
-        "js-yaml": "^3.11.0",
+        "inquirer": "^6.4.1",
+        "is-glob": "^4.0.0",
+        "js-yaml": "^3.13.1",
         "json-stable-stringify-without-jsonify": "^1.0.1",
         "levn": "^0.3.0",
-        "lodash": "^4.17.5",
+        "lodash": "^4.17.14",
         "minimatch": "^3.0.4",
         "mkdirp": "^0.5.1",
         "natural-compare": "^1.4.0",
         "optionator": "^0.8.2",
-        "path-is-inside": "^1.0.2",
-        "pluralize": "^7.0.0",
         "progress": "^2.0.0",
-        "regexpp": "^2.0.0",
-        "require-uncached": "^1.0.3",
-        "semver": "^5.5.0",
-        "strip-ansi": "^4.0.0",
-        "strip-json-comments": "^2.0.1",
-        "table": "^4.0.3",
-        "text-table": "^0.2.0"
+        "regexpp": "^2.0.1",
+        "semver": "^6.1.2",
+        "strip-ansi": "^5.2.0",
+        "strip-json-comments": "^3.0.1",
+        "table": "^5.2.3",
+        "text-table": "^0.2.0",
+        "v8-compile-cache": "^2.0.3"
       },
       "dependencies": {
-        "glob": {
-          "version": "7.1.3",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
-          "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
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-          "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
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@@ -2215,12 +2258,6 @@
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-      "resolved": "https://registry.npmjs.org/psl/-/psl-1.1.31.tgz",
-      "integrity": "sha512-/6pt4+C+T+wZUieKR620OpzN/LlnNKuWjy1iFLQ/UG35JqHlR/89MP1d96dUfkf6Dne3TuLQzOYEYshJ+Hx8mw==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/psl/-/psl-1.3.0.tgz",
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@@ -2273,9 +2310,9 @@
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+      "version": "16.9.0",
+      "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.9.0.tgz",
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@@ -2390,16 +2427,6 @@
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@@ -2407,9 +2434,9 @@
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-      "integrity": "sha1-Jsv+k10a7uq7Kbw/5a6wHpPUQiY=",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
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@@ -2432,9 +2459,9 @@
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+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.4.tgz",
+          "integrity": "sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==",
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@@ -2463,18 +2490,18 @@
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-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-5.5.12.tgz",
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+      "version": "6.5.2",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.2.tgz",
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       "dev": true,
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-        "symbol-observable": "1.0.1"
+        "tslib": "^1.9.0"
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-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
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@@ -2517,11 +2544,13 @@
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+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-2.1.0.tgz",
+      "integrity": "sha512-Qu+VC3EwYLldKa1fCxuuvULvSJOKEgk9pi8dZeCVK7TqBfUNTH4sFkk4joj8afVSfAYgJoSOetjx9QWOJ5mYoQ==",
       "dev": true,
       "requires": {
+        "ansi-styles": "^3.2.0",
+        "astral-regex": "^1.0.0",
         "is-fullwidth-code-point": "^2.0.0"
       }
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@@ -2562,9 +2591,9 @@
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-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.4.tgz",
-      "integrity": "sha512-7j8LYJLeY/Yb6ACbQ7F76qy5jHkp0U6jgBfJsk97bwWlVUnUWsAgpyaCvo17h0/RQGnQ036tVDomiwoI4pDkQA==",
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.5.tgz",
+      "integrity": "sha512-J+FWzZoynJEXGphVIS+XEh3kFSjZX/1i9gFBaWQcB+/tmpe2qUsSBABpcxqxnAxFdiUFEgAX1bjYGQvIZmoz9Q==",
       "dev": true
     },
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@@ -2591,32 +2620,32 @@
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-      "resolved": "https://registry.npmjs.org/standard/-/standard-12.0.1.tgz",
-      "integrity": "sha512-UqdHjh87OG2gUrNCSM4QRLF5n9h3TFPwrCNyVlkqu31Hej0L/rc8hzKqVvkb2W3x0WMq7PzZdkLfEcBhVOR6lg==",
+      "version": "13.1.0",
+      "resolved": "https://registry.npmjs.org/standard/-/standard-13.1.0.tgz",
+      "integrity": "sha512-h3NaMzsa88+/xtjXCMvdn6EWWdlodsI/HvtsQF+EGwrF9kVNwNha9TkFABU6bSBoNfC79YDyIAq9ekxOMBFkuw==",
       "dev": true,
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-        "eslint-config-standard": "12.0.0",
-        "eslint-config-standard-jsx": "6.0.2",
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-        "eslint-plugin-node": "~7.0.1",
-        "eslint-plugin-promise": "~4.0.0",
-        "eslint-plugin-react": "~7.11.1",
+        "eslint": "~6.1.0",
+        "eslint-config-standard": "13.0.1",
+        "eslint-config-standard-jsx": "7.0.0",
+        "eslint-plugin-import": "~2.18.0",
+        "eslint-plugin-node": "~9.1.0",
+        "eslint-plugin-promise": "~4.2.1",
+        "eslint-plugin-react": "~7.14.2",
         "eslint-plugin-standard": "~4.0.0",
-        "standard-engine": "~9.0.0"
+        "standard-engine": "~11.0.1"
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     "standard-engine": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/standard-engine/-/standard-engine-9.0.0.tgz",
-      "integrity": "sha512-ZfNfCWZ2Xq67VNvKMPiVMKHnMdvxYzvZkf1AH8/cw2NLDBm5LRsxMqvEJpsjLI/dUosZ3Z1d6JlHDp5rAvvk2w==",
+      "version": "11.0.1",
+      "resolved": "https://registry.npmjs.org/standard-engine/-/standard-engine-11.0.1.tgz",
+      "integrity": "sha512-WZQ5PpEDfRzPFk+H9xvKVQPQIxKnAQB2cb2Au4NyTCtdw5R0pyMBUZLbPXyFjnlhe8Ae+zfNrWU4m6H5b7cEAg==",
       "dev": true,
       "requires": {
-        "deglob": "^2.1.0",
-        "get-stdin": "^6.0.0",
+        "deglob": "^3.0.0",
+        "get-stdin": "^7.0.0",
         "minimist": "^1.1.0",
-        "pkg-conf": "^2.0.0"
+        "pkg-conf": "^3.1.0"
       }
     },
     "string-width": {
@@ -2665,24 +2694,56 @@
         "has-flag": "^1.0.0"
       }
     },
-    "symbol-observable": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.0.1.tgz",
-      "integrity": "sha1-g0D8RwLDEi310iKI+IKD9RPT/dQ=",
-      "dev": true
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     "table": {
-      "version": "4.0.3",
-      "resolved": "https://registry.npmjs.org/table/-/table-4.0.3.tgz",
-      "integrity": "sha512-S7rnFITmBH1EnyKcvxBh1LjYeQMmnZtCXSEbHcH6S0NoKit24ZuFO/T1vDcLdYsLQkM188PVVhQmzKIuThNkKg==",
+      "version": "5.4.6",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.4.6.tgz",
+      "integrity": "sha512-wmEc8m4fjnob4gt5riFRtTu/6+4rSe12TpAELNSqHMfF3IqnA+CH37USM6/YR3qRZv7e56kAEAtd6nKZaxe0Ug==",
       "dev": true,
       "requires": {
-        "ajv": "^6.0.1",
-        "ajv-keywords": "^3.0.0",
-        "chalk": "^2.1.0",
-        "lodash": "^4.17.4",
-        "slice-ansi": "1.0.0",
-        "string-width": "^2.1.1"
+        "ajv": "^6.10.2",
+        "lodash": "^4.17.14",
+        "slice-ansi": "^2.1.0",
+        "string-width": "^3.0.0"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "6.10.2",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
+          "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^2.0.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.1.0"
+          }
+        }
       }
     },
     "text-table": {
@@ -2724,6 +2785,12 @@
         }
       }
     },
+    "tslib": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.10.0.tgz",
+      "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==",
+      "dev": true
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -2754,6 +2821,12 @@
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       "dev": true
     },
+    "type-fest": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.3.1.tgz",
+      "integrity": "sha512-cUGJnCdr4STbePCgqNFbpVNCepa+kAVohJs1sLhxzdH+gnEoOd8VhbYa7pD3zZYGiURWM2xzEII3fQcRizDkYQ==",
+      "dev": true
+    },
     "uglify-js": {
       "version": "3.5.10",
       "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.5.10.tgz",
@@ -2797,9 +2870,15 @@
       }
     },
     "uuid": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",
+      "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ==",
+      "dev": true
+    },
+    "v8-compile-cache": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
+      "integrity": "sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==",
       "dev": true
     },
     "validate-npm-package-license": {
@@ -2917,18 +2996,18 @@
       "dev": true
     },
     "write": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
-      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
       "dev": true,
       "requires": {
         "mkdirp": "^0.5.1"
       }
     },
     "xtend": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
       "dev": true
     },
     "y18n": {
diff --git a/package.json b/package.json
index 6aaa6b1..e05ebd2 100644
--- a/package.json
+++ b/package.json
@@ -30,11 +30,11 @@
   },
   "devDependencies": {
     "chai": "^4.2.0",
-    "coveralls": "^3.0.3",
+    "coveralls": "^3.0.6",
     "istanbul": "^0.4.5",
-    "mocha": "^6.1.4",
+    "mocha": "^6.2.0",
     "mocha-lcov-reporter": "1.3.0",
-    "standard": "^12.0.1",
+    "standard": "^13.1.0",
     "watch": "^1.0.2"
   }
 }
diff --git a/test.js b/test.js
index 5ad3834..dcbfd8c 100644
--- a/test.js
+++ b/test.js
@@ -1,10 +1,8 @@
 /* globals describe, it */
 
-const chai = require('chai')
+const { expect } = require('chai')
 const timestring = require('./index')
 
-const expect = chai.expect
-
 describe('timestring', () => {
   it('can parse a timestring', () => {
     expect(timestring('500ms')).to.equal(0.5)
@@ -18,7 +16,7 @@ describe('timestring', () => {
   })
 
   it('can parse different unit identifiers', () => {
-    let unitMap = {
+    const unitMap = {
       ms: ['ms', 'milli', 'millisecond', 'milliseconds'],
       s: ['s', 'sec', 'secs', 'second', 'seconds'],
       m: ['m', 'min', 'mins', 'minute', 'minutes'],
@@ -69,7 +67,7 @@ describe('timestring', () => {
   })
 
   it('uses the passed options instead of the defaults', () => {
-    let opts = {
+    const opts = {
       hoursPerDay: 1,
       daysPerWeek: 2,
       weeksPerMonth: 3,