Update package.json and webpack.mix.js

Changelog

@@ -1,4 +1,5 @@
 2019-05-14 DariusIII
+	* Chg: Update package.json and webpack.mix.js
 	* Chg: Remove unused basePage() function from BasePageController
 	* Chg: Update phpunit/phpunit (7.5.10 => 7.5.11)
 2019-05-13 DariusIII

package.json

@@ -15,9 +15,10 @@
         "cross-env": "^5.2.0",
         "jquery": "^3.4",
         "laravel-mix": "^4.0.15",
+        "laravel-mix-purgecss": "^4.1.0",
         "lodash": "^4.17.11",
         "popper.js": "^1.15.0",
-        "prettier": "^1.17.0",
+        "prettier": "^1.17.1",
         "vue": "^2.6.10"
     },
     "dependencies": {

webpack.mix.js

@@ -1,4 +1,5 @@
 const mix = require('laravel-mix');
+require('laravel-mix-purgecss');
 
 /*
  |--------------------------------------------------------------------------
@@ -33,6 +34,7 @@ mix
             'node_modules/multiselect/css/multi-select.css',
             'resources/assets/css/custom.css'
     ], 'public/assets/css/all-css.css')
+    .purgeCss()
     .scripts(
         [
             'node_modules/jquery/dist/jquery.min.js',