Approved label added with 1 approval and 1 change request

[allout58]

Summary

The approved label is added incorrectly when there is one approving review followed by one changes requested review.

Steps to reproduce

1. Set up branch protections to require 1 (might not be relevant?)
2. Request 2 reviews
3. First reviewer approves the changes (should go to PR: partially-approved, which occurs)
4. Second reviewer requests changes

Pull Request URL

Private repo unfortunately

What is the current bug behavior?

PR: reviewed-approved label is added

What is the expected correct behavior?

PR: reviewed-changes-requested label is added

Relevant logs and/or screenshots

Possible fixes

(If you have any idea to solve the problem, please help us.)
Most likely related to #223. I'm willing to take a crack at a PR in the future, but a little busy at the moment.