アクティブでなさそうなSlackチャンネルにメッセージを送る ref: https://qiita.com/9renpoto/items/2b1aabb64957feca3995

file0.js

const { channels } = await web.conversations.list({
  exclude_archived: true
})

file1.js

const { channels } = await web.conversations.list({
  exclude_archived: true
})

package.json

  "dependencies": {
    "@slack/client": "4.8.0",
    "moment": "2.22.2"
  },