Update test webpack configuration for updated dependencies

Author: jasongrout

packages/base-manager/test/webpack.conf.js

@@ -16,5 +16,6 @@ module.exports = {
       { test: /\.ipynb$/, use: 'json-loader' }
     ]
   },
-  mode: 'development'
+  mode: 'development',
+  resolve: {fallback: { util: false } }
 };

packages/base/test/webpack.conf.js

@@ -16,5 +16,6 @@ module.exports = {
       { test: /\.ipynb$/, use: 'json-loader' }
     ]
   },
-  mode: 'development'
+  mode: 'development',
+  resolve: {fallback: { util: false } }
 };

packages/controls/test/webpack.conf.js

@@ -16,5 +16,6 @@ module.exports = {
       { test: /\.ipynb$/, loader: 'json-loader' }
     ]
   },
-  mode: 'development'
+  mode: 'development',
+  resolve: {fallback: { util: false } }
 };

packages/html-manager/package.json

@@ -61,6 +61,10 @@
     "karma-mocha": "^2.0.1",
     "karma-mocha-reporter": "^2.2.5",
     "mocha": "^9.0.0",
+    "postcss": "^8.3.2",
+    "postcss-cssnext": "^3.1.0",
+    "postcss-import": "^14.0.2",
+    "postcss-loader": "^6.1.0",
     "rimraf": "^3.0.2",
     "style-loader": "^2.0.0",
     "typescript": "~4.3.2",