tests

Move `open` to container #105

Job	Run time
py-3.9 lib-6.0 windows-latest	3m 42s
package-source	11s
py-3.9 lib-5.1 windows-latest	2m 10s
py-3.9 lib-6.0 ubuntu-latest	1m 50s
Style	7s
py-3.9 lib-5.1 ubuntu-latest	1m 47s
py-3.9 lib-6.0 macos-latest	4m 22s
package-wheel (macos-latest, arm64)	1m 24s
package-wheel (macos-latest, x86_64)	1m 17s
package-wheel (ubuntu-latest, i686)	53s
package-wheel (ubuntu-latest, x86_64)	2m 37s
package-wheel (windows-latest, AMD64)	1m 26s
publish	0s
	21m 46s

Provide feedback