command stat tracking (for runtime only)

structure/extensions/Message.js

@@ -70,9 +70,11 @@ const Message = Structures.extend('Message', (Message) => {
                     params: this.parameters,
                     args: this.arguments
                 });
+                this.command._invokes.success++;
                 if(resolved instanceof Promise) await resolved;
                 return { error: false };
-            } catch(error) {
+            } catch (error) {
+                this.command._invokes.fail++;
                 return { error: true, message: error };
             }