test: coverage #20

Job	Run time
fmt-clippy (windows-latest)	4m 27s
fmt-clippy (macos-13)	2m 53s
fmt-clippy (ubuntu-20.04)	1m 27s
plugins (windows-latest)	6m 2s
std-lib-and-python-virtualenv (ubuntu-20.04, py)	2m 22s
plugins (macos-13)	2m 52s
tests (windows-latest)	5m 3s
plugins (ubuntu-20.04)	1m 54s
std-lib-and-python-virtualenv (macos-latest, py)	2m 49s
Build WASM	1m 32s
tests (macos-latest)	3m 10s
std-lib-and-python-virtualenv (windows-latest, py)	6m 41s
Clippy WASM	1m 12s
tests (ubuntu-20.04)	4m 35s
	46m 59s

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