0.14.0 release?

[PragTob]

All outstanding PRs were closed and among them are some neat bugfixes and features, sounds like a nice thing to release to everyone.

What do you think? @colszowka @bf4

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Enhancements

• Officially support JRuby 9.1+ going forward (should also work with previous releases). See #547 (ping @PragTob when encountering issues)
• Add Channel group to Rails profile, when ActionCable is loaded. See #492 (thanks @BenMorganIO)
• Stop extending instances of Array and Hash during merging results avoiding problems frozen results while manually merging results. See #558 (thanks @aroben)

Bugfixes

• Fix parallel_tests when a thread ends up running no tests. See #533 (thanks @cshaffer)
• Skip the :nocov: comments along with the code that they skip. See #551 (thanks @ebiven)
• Fix crash when Home environment variable is unset. See #482 (thanks @waldyr)
• Make track_files work again when explicitly setting it to nil. See #463 (thanks @craiglittle)
• Do not overwrite .last_run.json file when refuse_coverage_drop option is enabled and the coverage has dropped (lead to you being able to just rerun tests and everything was fine). See #553 (thanks @Miloshes)

[colszowka]

I haven't looked at the PRs individually, but sounds very good to me! Particularilly big +1 on cleaning up the mess of merge helpers.

[PragTob]

Well no rejections then, let's get this party started :D