Fix the webpack build due to dependOn issue

As stated in Webpack documentation, when using multiple entrypoints
and dependencies, it is recommended to export the runtime as a single
separated chunk.

See: https://webpack.js.org/guides/code-splitting/#entry-dependencies

core/admin/assets/webpack.config.js

@@ -60,6 +60,7 @@ module.exports = {
     ],
     optimization: {
         minimize: true,
+        runtimeChunk: 'single',
         minimizer: [
             new terse(),
             new mini({