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Merge pull request contributor-assistant#87 from cla-assistant/refactor

Refactor

Merge pull request contributor-assistant#78 from cla-assistant/lock-p…

…r-optionalflag

adds optional flag for locking pull request 🎉

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Merge branch 'master' of https://github.com/cla-assistant/github-action

update changelog

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Merge pull request contributor-assistant#44 from cla-assistant/update…

…documents

Updatedocuments