chore(webpack): migrate to node-polyfill-webpack-plugin v4

Signed-off-by: Grigorii K. Shartsev <me@shgk.me>

webpack.common.js

@@ -169,7 +169,9 @@ const config = {
 
 	plugins: [
 		new VueLoaderPlugin(),
-		new NodePolyfillPlugin(),
+		new NodePolyfillPlugin({
+			additionalAliases: ['process'],
+		}),
 		new webpack.ProvidePlugin({
 			// Provide jQuery to jquery plugins as some are loaded before $ is exposed globally.
 			// We need to provide the path to node_moduels as otherwise npm link will fail due