Eslint (#126)

* adding eslint to webpack and fixing errors

* updating screenshot and tests to reflect dom changes

webpack.config.js

@@ -36,6 +36,11 @@ const defaultConfig = {
         exclude: /node_modules/,
         use: ['babel-loader'],
       },
+      {
+        test: /\.js$/,
+        exclude: /node_modules/,
+        use: ['eslint-loader']
+      },      
       {
         test: /\.(scss|css)$/,
         use: [