Merge pull request #439 from devoto13/patch-1

Fixed stale configuration option name

Author: SpaceK33z

content/concepts/plugins.md

@@ -54,7 +54,7 @@ const config = {
     path: './dist'
   },
   module: {
-    loaders: [
+    rules: [
       {
         test: /\.(js|jsx)$/,
         loader: 'babel-loader'