Nuxt.jsで発生したエラーをなんとかしたい。

前提・実現したいこと

現在、potato4dさんのGitHubに記載されているnuxt-firebase-sns-exampleを写経させていただいているのですが、
storeディレクトリ内のindex.jsファイルを写経中の時にrequire-awaitというエラーが発生してしまいました。

発生している問題・エラーメッセージ

 95:3  error  Async method 'sendPost' has no 'await' expression  require-await

該当のソースコード

indexjs
1import cloneDeep from 'lodash.clonedeep'
2import dayjs from 'dayjs'
3import uuid from 'uuid/v4'
4
5export const state = () => ({
6  user: null,
7  users: [],
8  posts: [],
9  isFetching: false
10})
11
12export const getters = {
13  user: state => state.user,
14  posts: state => state.posts,
15  isFetching: state => state.isFetching
16}
17
18export const mutations = {
19  setUser (state, { user }) {
20    state.user = cloneDeep(user)
21  },
22  setUsers (state, { users }) {
23    state.users = users
24  },
25  setPosts (state, { posts }) {
26    state.posts = posts
27  },
28  setPost (state, { post }) {
29    if (state.posts.find(p => p.id === post.id)) {
30      return
31    }
32    post.user = state.users.find(user => user.email === post.from)
33    state.posts = [...state.posts, post]
34  },
35  unshiftPost (state, { post }) {
36    if (state.posts.find(p => p.id === post.id)) {
37      return
38    }
39    post.user = state.users.find(user => user.email === post.from)
40    state.posts = [post, ...state.posts]
41  },
42  setIsFetching (state, next) {
43    state.isFetching = !!next
44  }
45}
46
47export const actions = {
48  async nuxtServerInit ({ commit }) {
49    const posts = []
50    const users = []
51    const [usersSnapshot, postsSnapshot] = await Promise.all([
52      this.$firestore.collection('users').get(),
53      this.$firestore
54        .collection('posts')
55        .orderBy('createdAt', 'desc')
56        .limit(20)
57        .get()
58    ])
59    usersSnapshot.forEach((user) => {
60      users.push(user.data())
61    })
62    postsSnapshot.forEach((postsSnapshot) => {
63      const post = postsSnapshot.data()
64      post.user = users.find(user => user.email === post.from)
65      posts.unshift(post)
66    })
67    commit('setUsers', { users })
68    commit('setPosts', { posts })
69  },
70  async fetchPosts ({ commit, state }) {
71    if (state.setIsFetching) { return }
72    commit('setIsFetching', true)
73    try {
74      const posts = []
75      const postsSnapshot = await this.$firestore
76        .collection('posts')
77        .orderBy('createdAt', 'desc')
78        .startAfter(state.posts[0].createdAt)
79        .limit(20)
80        .get()
81      postsSnapshot.forEach((postsSnapshot) => {
82        const post = postsSnapshot.data()
83        post.user = state.users.find(user => user.email === post.from)
84        posts.push(post)
85      })
86      posts.forEach((post) => {
87        commit('unshiftPosts', { post })
88      })
89      return posts[0]
90    } catch (e) {
91    } finally {
92      commit('setIsFetching', false)
93    }
94  },
95  async sendPost ({ commit, state }, { body }) {
96    const id = `${3000000000 + dayjs().unix()}-${uuid().replace(/-g/, '')}`
97    const from = state.user.email
98    const createdAt = 3000000000 + dayjs().unix()
99    this.$firestore
100      .collection('posts')
101      .doc(`${id}`)
102      .set({
103        id,
104        from,
105        body,
106        createdAt
107      })
108  }
109}
110