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Merge pull request #1787 from troessner/update-gemspec-runtime-depend… #495

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Run time

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Job	Run time
test (3.0)	2m 4s
rubocop	15s
test (3.1)	1m 58s
test (3.2)	1m 53s
test (jruby-9.4)	17m 54s
test (3.3)	1m 57s
	26m 1s