[READY] Merge master into v2.x (please don't squash commits!) #385

Job	Run time
rubocop	8s
Unit test (ubuntu-20.04, 3)	1m 46s
Unit test (ubuntu-20.04, 3.1)	1m 47s
Unit test (ubuntu-20.04, 3.2)	1m 50s
Unit test (ubuntu-20.04, 3.3)	1m 49s
Unit test (ubuntu-20.04, jruby-9.4)	2m 31s
Unit test (ubuntu-20.04, truffleruby)	3m 50s
Unit test (macos-latest, 3)	2m 0s
Unit test (macos-latest, 3.1)	1m 37s
Unit test (macos-latest, 3.2)	1m 36s
Unit test (macos-latest, 3.3)	1m 58s
Unit test (macos-latest, jruby-9.4)	2m 0s
Unit test (macos-latest, truffleruby)	2m 46s
Unit test (windows-latest, 3)	4m 44s
Unit test (windows-latest, 3.1)	3m 30s
Unit test (windows-latest, 3.2)	3m 36s
Unit test (windows-latest, 3.3)	3m 24s
finish	5s
	40m 57s

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