PropCheck 1.3.0 is released now.
You can remove the outdated check in the protected branch settings of the repository settings.
Hm, it seems that stacktraces are somehow broken (maybe due to OTP 23?). With verbose:
Failed: The input fails the test. An exception was raised: ** (FunctionClauseError) no function clause matching in DateTime.to_unix/2 Stacktrace:
The actual stacktrace is not being written. PropCheck as of v1.3.0.
PROPCHECK_DETECT_EXCEPTIONS=1; with that, the exception is output in red.