Automerge fails when author of a commit is not defined

[marco-ippolito]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Fastify version

3.0.0

Plugin version

3.2.2

Node.js version

18.7.0

Operating system

macOS

Operating system version (i.e. 20.04, 11.3, 10)

12.5.1

Description

When automerging it checks if in the commit list there is a non-dependabot commit, by doing so it goes into uncaught exception if there is an unkown author commit.

Steps to Reproduce

tap.test('should skip PR with non dependabot commit', async () => {
  const PR_NUMBER = Math.random()
  const { action, stubs } = buildStubbedAction({
    payload: {
      pull_request: {
        user: {
          login: BOT_NAME,
        },
        number: PR_NUMBER,
      },
    },
    inputs: { PR_NUMBER },
  })

  stubs.prCommitsStub.resolves([
    {
      author: undefined
    },
  ])

  await action()

  sinon.assert.calledOnce(stubs.prCommitsStub)
  sinon.assert.calledWithExactly(
    stubs.logStub.logWarning,
    'PR contains non dependabot commits, skipping.'
  )
  sinon.assert.notCalled(stubs.approveStub)
  sinon.assert.notCalled(stubs.mergeStub)
})`
``

### Expected Behavior

I think it should check if the commit has a known author.

[simoneb]

The intended behavior is that an unknown author is considered the same as an author who's not dependabot

[github-actions]

🎉 This issue has been resolved in version 3.2.3 🎉

The release is available on:

• GitHub release

Your optic bot 📦🚀