test: add jest and simple spec

packages/webpack5/src/configuration/vue.ts

@@ -1,15 +1,18 @@
 import base from './base';
+import Config from 'webpack-chain';
 
 // todo: add base configuration for vue
 export default function (env) {
-	const config = base(env);
+	const config = new Config().merge(base(env));
 
 	// todo: we may want to use webpack-chain internally
 	// to avoid "trying to read property x of undefined" type of issues
-	config.module.rules.push({
-		test: /.vue$/,
-		use: [],
-	});
+	/*
+		config.module.rules.push({
+			test: /.vue$/,
+			use: [],
+		});
+	*/
 
 	return {};
 }