AddShiptItLabel.ts

import { Application } from 'probot'
import { PullRequestsCreateReviewParams } from '@octokit/rest'

export = (app: Application) => {
  app.on(['pull_request.opened', 'pull_request.labeled'], async (context) => {

    const pullRequest = context.payload.pull_request
    const hasShiptItLabel: string[] = pullRequest.labels
                                                 .map((label: any) => label.name)
                                                 .includes('shipit')

    if (hasShipItLabel) {
        const params = context.issue({ event: 'APPROVE' })
        await context.github.pullRequests.createReview(params as PullRequestsCreateReviewParams)
    }
  })
}