`update-pr-from-base-branch` doesn't add buttons for failing checks #3699

Continued from #3155, I'm running into two new scenarios where the button isn't showing up:

• If you don't have the required number of approvers
• If required status checks are failing

<img width="860" alt="Screen Shot 2020-11-04 at 2 59 45 PM" src="https://user-images.githubusercontent.com/26171/98161942-8fc30e80-1eae-11eb-9011-e53a34a369d2.png"> <img width="858" alt="Screen Shot 2020-11-04 at 3 00 07 PM" src="https://user-images.githubusercontent.com/26171/98161943-905ba500-1eae-11eb-9169-6c0fb021cab4.png">

A partial workaround is to switch it back to a draft PR, but thats a little awkward.

(Thanks for the great extension!)