FIX storybook webpack setup HMR; partial downgrade back to v4.0.4

.storybook/webpack.config.js

@@ -1,24 +1,16 @@
+const merge = require('webpack-merge');
+
+const webpackProjectConfig = require('../webpack.common');
+//
 // you can use this file to add your custom webpack plugins, loaders and anything you like.
 // This is just the basic way to add additional webpack configurations.
 // For more information refer the docs: https://storybook.js.org/configurations/custom-webpack-config
-
+//
 // IMPORTANT
 // When you add this file, we won't add the default configurations which is similar
 // to "React Create App". This only has babel loader to load JavaScript.
-const webpackProjectConfig = require('../webpack.common');
-
-module.exports = {
-  plugins: webpackProjectConfig.plugins,
-  module: {
-    rules: [
-      // add your custom rules.
-    ],
-  },
-  externals: {
-    'jsdom': 'window',
-    'cheerio': 'window',
-    'react/lib/ExecutionEnvironment': true,
-    'react/lib/ReactContext': 'window',
-    'react/addons': true,
-  }
-};
+module.exports = (storybookBaseConfig, configType) => {
+  return merge.smart(storybookBaseConfig, {
+    plugins: webpackProjectConfig.plugins
+  });
+}

package.json

@@ -50,11 +50,11 @@
     "@babel/polyfill": "^7.2.5",
     "@babel/preset-env": "^7.3.1",
     "@babel/preset-react": "^7.0.0",
-    "@storybook/addon-actions": "^4.1.11",
-    "@storybook/addon-links": "^4.1.11",
-    "@storybook/addon-options": "^4.1.11",
-    "@storybook/addons": "^4.1.11",
-    "@storybook/react": "^4.1.11",
+    "@storybook/addon-actions": "^4.0.4",
+    "@storybook/addon-links": "^4.0.4",
+    "@storybook/addon-options": "^4.0.4",
+    "@storybook/addons": "^4.0.4",
+    "@storybook/react": "^4.0.4",
     "babel-eslint": "^10.0.1",
     "babel-loader": "^8.0.5",
     "babel-plugin-emotion": "^9.2.11",