fix storybook and cypress build, using webpack v4

package.json

@@ -65,13 +65,13 @@
     "@mui/icons-material": "^5.0.0",
     "@mui/material": "^5.0.0",
     "@next/mdx": "^10.0.2",
-    "@vulcanjs/demo": "latest",
-    "@vulcanjs/graphql": "latest",
-    "@vulcanjs/mdx": "latest",
-    "@vulcanjs/meteor-legacy": "latest",
-    "@vulcanjs/mongo": "latest",
-    "@vulcanjs/react-hooks": "latest",
-    "@vulcanjs/react-ui": "latest",
+    "@vulcanjs/demo": "^0.4.0",
+    "@vulcanjs/graphql": "^0.4.0",
+    "@vulcanjs/mdx": "^0.4.0",
+    "@vulcanjs/meteor-legacy": "^0.4.0",
+    "@vulcanjs/mongo": "^0.4.0",
+    "@vulcanjs/react-hooks": "^0.4.0",
+    "@vulcanjs/react-ui": "^0.4.0",
     "apollo-server-express": "2.14.2",
     "babel-jest": "26.0.1",
     "babel-plugin-istanbul": "6.0.0",

packages/@vulcanjs/webpack/extendWebpackConfig.js

@@ -6,6 +6,7 @@
 // type Environment = "server" | "client"
 
 const path = require("path");
+const webpack = require("webpack");
 
 const withMagicImports = (config = {}) => {
   if (!config.resolve) config.resolve = {};
@@ -59,12 +60,15 @@ const extendWebpackConfig = (environment) => (webpackConfig) => {
   // @see https://github.com/angular/angular-cli/issues/20819
   // TODO: this is the sign of a server code leak, investigate if still needed
   // after we get rid of those leaks (O9/2021)
-  webpackConfig.resolve.fallback = {
-    events: false,
-    path: false,
-    stream: false,
-    util: false,
-  };
+  const isV5 = webpack.version.match(/5\.\d+\.\d+/);
+  if (isV5) {
+    webpackConfig.resolve.fallback = {
+      events: false,
+      path: false,
+      stream: false,
+      util: false,
+    };
+  }
 
   withMagicImports(webpackConfig);
   return webpackConfig;