Dedupe Reviewers and TeamReviewers before submitting them to GitHub

[FraBle]

Fixes #855

The code takes the same deduping method as the DetailsReviewers handler.

[palantirtech]

Thanks for your interest in palantir/policy-bot, @FraBle! Before we can accept your pull request, you need to sign our contributor license agreement - just visit https://cla.palantir.com/ and follow the instructions. Once you sign, I'll automatically update this pull request.

[FraBle]

I signed the CLA

Invalidated by push of a3e0000

[bluekeyes]

Thanks for the PR. You can test this out using the palantirtechnologies/policy-bot:snapshot image - if it fixes the problem, I can make a new release.

[FraBle]

@bluekeyes Confirmed. The snapshot works fine for us now. 💯

[bluekeyes]

Thanks for verifying, 1.36.1 is out now with the fix

[maschwenk]

@bluekeyes @FraBle thank you! that turnaround time was amazing!