Reviews result in two messages being sent

[Ghabry]

Looks like Github changed slightly the interface for reviews:

In my previous commit I fixed a 500 error when an empty body is received but this results now in two messages.

e.g.

> carstene1ns reviewed pull request 490
> carstene1ns commented on pull request 490
> [The review message]

The documentation of the API is lacking so I'm just guessing a bit here what would make sense in handling this. 😅

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When it's a pull_request_review: These always have empty body payloads now (null).

Ignore them, except when review.state is approved or changes_requested.

review.state == commented is the part that spams now.

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When it's a pull_request_review_comment: No changes required.

[Ghabry]

unrelated:

There are also multiple 500 errors for unhandled events such as check_suite.completed.

But it should actually return 204 in this case. So likely reading some missing key from the JSON.