Better crash detection test

[goodtrailer]

Not sure how it's never occurred to me until now, but it should be pretty easy to just run a test map on auto play. This should be a much better compatibility/crash detector. Currently the only test is a build, which only detects API breakage. Sadly, this won't detect ABI breakage. Maybe there is a way to test this by building on an older version and linking with a newer version? Maybe the simplest solution is just to auto-merge if the auto play test passes, and then upload the artifact as a release.