Run CI tests on Ruby 2.5, 2.6, and 2.7#101

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bensheldon merged 1 commit intobensheldon:mainfrom arku:feat/ci-job-build-matrix

Aug 27, 2020

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Commits on Aug 26, 2020

Run CI tests on Ruby 2.5, 2.6, and 2.7
arku
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