[new feature] hope to support vue class component

[cat-walk]

First of all, thanks for the great plugin 'vue-helper', it do help me a lot in the work. It works great with the normal vue component that using vue.extends and {}.
However, there are some users that using the vue-class-component as it has some nice feature like decoartor etc.
So I sincerely hope that u can support vue-class-component at the next version.

@Component
export default class Mine extends Vue {
  @Action(Types.FETCH_AND_SET_USER_INFO) dispatchFetchAndSetUserInfo

  @Mutation(Types.LOGOUT) mutationLogout

  @State((state) => state.user) user: IstoreUser

  get secretedPhone() {
    return Utils.Formatter.secertMobile(this.user.info.mobile)
  }
}