when i use vuex2.0 -- mapActions

the code like this https://vuex.vuejs.org/zh-cn/actions.html

...mapActions([
'increment' // 映射 this.increment() 为 this.$store.dispatch('increment')
]),

vue-cli return a error

node build/dev-server.js

(node:5264) DeprecationWarning: loaderUtils.parseQuery() received a non-string value which can be problematic, see webpack/loader-utils#56
parseQuery() will be replaced with getOptions() in the next major version of loader-utils.

ERROR Failed to compile with 1 errors 17:21:56

This dependency was not found in node_modules:

• babel-runtime/helpers/extends in .//.npminstall/babel-loader/6.3.2/babel-loader/lib!.//.npminstall/vue-loader/11.1.0/vue-loader/lib/selector.js?type=script&index=0!./src/components/Hello.vue

Did you forget to run npm install --save for it?

Listening at http://localhost:8080