New gem release

[larskanis]

The latest release minitest-parallel_fork-1.1.2 doesn't contain the callback as described in the README:

Minitest.on_parallel_fork_marshal_failure do
end

@jeremyevans Could you please make a new release to make it easily available?

[jeremyevans]

Definitely. Sorry I didn't do this sooner, looks like it has been almost 2 years since that was committed. I'll try to get the release out later today.

[jeremyevans]

Looks like there some issues with newer versions of minitest. Fixing those issues now.

[jeremyevans]

Fixed those issues and released version 1.2.0. Thanks again for the reminder.

[larskanis]

Thank you for maintaining this gem! I came across the incompatibility to Minitest-5.14+ as well, but was blocked by a ruby-core issue with Marshal.dump before submitting a PR. The Marshal bug affects this gem and can be worked around by catching TypeError and IOError. But I think it's seldom enough to keep the code how it is.