refactor(coverage): refactor code coverage generation

.gitignore

@@ -1 +1,2 @@
 node_modules
+coverage

.travis.yml

@@ -22,7 +22,6 @@ script:
   - npm run sa
 
 after_script:
-  - istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec
+  - npm run cover
   - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
   - cat ./coverage/lcov.info | ./node_modules/codeclimate-test-reporter/bin/codeclimate.js
-  - rm -rf ./coverage

package.json

@@ -4,6 +4,7 @@
   "description": "Parse a human readable time string into a time based value",
   "main": "index.js",
   "scripts": {
+    "cover": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -x test.js test.js",
     "dev": "watch 'clear; npm test -s;' ./ -d",
     "sa": "jshint index.js && jscs index.js",
     "test": "mocha test.js"