fix example config, previously not including ts files in regex

Author: clairep94

webpack/config.examples.js

@@ -22,7 +22,7 @@ module.exports = [
     module: {
       rules: [
         {
-          test: /\.js$/,
+          test: /\.[jt]sx?$/,
           exclude: /node_modules/,
           loader: 'babel-loader',
           options: {