chore: remove trailing comma [ci skip]

Author: haoqunjiang

packages/@vue/cli-plugin-e2e-cypress/generator/template/tests/e2e/plugins/index.js

@@ -4,7 +4,7 @@ const webpack = require('@cypress/webpack-preprocessor')
 module.exports = (on, config) => {
   on('file:preprocessor', webpack({
     webpackOptions: require('@vue/cli-service/webpack.config'),
-    watchOptions: {},
+    watchOptions: {}
   }))
 
   return Object.assign({}, config, {