Allow ongoing checks

[zhiyelee]

Main change

add allow_ongoing_checks option to update PRs that have ongoing checks when the action is triggered. close #33
Setting require_passed_checks to true alone may prevent updates to PRs with ongoing checks. It is advisable to set both require_passed_checks and allow_ongoing_checks to true.

[coveralls]

Pull Request Test Coverage Report for Build 10580960227

Details

• 13 of 13 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.7%) to 99.315%

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Totals
Change from base Build 9279987018:	-0.7%
Covered Lines:	104
Relevant Lines:	104

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💛 - Coveralls