fix(v2): map loaded modules to bundles (#1056)

* fix(v2): map loaded modules to bundles

* nits

v2/lib/webpack/base.js

@@ -60,6 +60,7 @@ module.exports = function createBaseConfig(props, isServer) {
         presets: ['@babel/env', '@babel/react'],
         plugins: [
           isServer ? 'dynamic-import-node' : '@babel/syntax-dynamic-import',
+          'react-loadable/babel',
         ],
       });
   }