Use the default Terser minifying plugin and configure it to avoid mangling.

Author: AlexPravdin

Diff for: webpack.config.js

@@ -1,5 +1,6 @@
 const path = require('path');
 const webpack = require('webpack');
+const TerserPlugin = require('terser-webpack-plugin');
 const { options: postgraphileOptions } = require('./src/postgraphileOptions.js');
 
 module.exports = {
@@ -42,4 +43,15 @@ module.exports = {
   node: {
     __dirname: false, // just output `__dirname`
   },
+  optimization: {
+    minimizer: [
+      new TerserPlugin({
+        terserOptions: {
+          // Without this, you may get errors such as
+          // `Error: GraphQL conflict for 'e' detected! Multiple versions of graphql exist in your node_modules?`
+          mangle: false,
+        },
+      }),
+    ],
+  },
 };