Automatically mark all but the last comment as resolved

[killercup]

GitHub now allows comments to be marked as "Resolved". I propose we automatically mark all old "failed on Travis" comments as resolved every time a new one gets added. This will improve the readability of discussions in PRs (especially in cases like rust-lang/rust#51249).

Sadly, it doesn't look like there is an API endpoint for doing this (neither in the REST v3 nor in the GraphQL API).

[kennytm]

See also #10 (comment) :)

[killercup]

Ah, great! Before researching this I was hoping it was just a simple API call. I agree the Checks API might be better suited.