chore(package): Use open sourced argv-set-env

After trying the custom set-env script and seeing that it works great, I open sourced it as
argv-set-env so I can use it in my own projects

Author: Kent C. Dodds

other/karma.conf.es6.js

@@ -1,5 +1,5 @@
 /* eslint-env node */
-require('./set-env')(process.argv);
+require('argv-set-env')();
 const path = require('path');
 
 process.env.NODE_ENV = process.env.NODE_ENV || 'test';

other/set-env.js

@@ -1,5 +1,5 @@
 /* eslint-env node */
-require('./set-env')(process.argv);
+require('argv-set-env')();
 const packageJson = require('../package.json');
 
 const here = require('path-here');

other/webpack.config.es6.js

@@ -52,6 +52,7 @@
     "angular": "1.4.7",
     "angular-mocks": "1.4.7",
     "api-check": "7.5.3",
+    "argv-set-env": "1.0.0",
     "babel": "5.8.23",
     "babel-eslint": "4.1.3",
     "babel-loader": "5.3.2",