chore(lint): code quality #118

Job	Run time
Lint	29s
Unit tests (ubuntu-latest, oldstable)	21s
Unit tests (windows-latest, oldstable)	1m 41s
Unit tests (macos-latest, oldstable)	35s
Unit tests (ubuntu-latest, stable)	35s
Unit tests (macos-latest, stable)	48s
Unit tests (windows-latest, stable)	1m 7s
tests completed	4s
collect test reports	22s
collect test coverage	10s
	6m 12s

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