update dev dependencies ava, eslint, eslint-plugin-ava and migrate to ES modules

webpack.config.cjs

@@ -0,0 +1,30 @@
+/* eslint-disable no-undef */
+const path = require('path')
+
+const CopyPlugin = require('copy-webpack-plugin')
+
+const FOLDER_SOURCE = './source'
+
+module.exports = {
+  entry: FOLDER_SOURCE + '/front/events-loader.js',
+  output: {
+    filename: 'events-loader.js',
+    path: path.resolve(__dirname, 'build/' + '/front'),
+  },
+  plugins: [
+    new CopyPlugin({
+      patterns: [
+        {
+          context: FOLDER_SOURCE,
+          from: '**/*.php',
+          to: '../',
+        },
+        {
+          context: FOLDER_SOURCE,
+          from: '**/*.txt',
+          to: '../',
+        },
+      ],
+    }),
+  ],
+}