tests

Add colorspace test #113

Job	Run time
Style	7s
py-3.9 lib-6.0 ubuntu-latest	3m 50s
py-3.9 lib-5.1 ubuntu-latest	3m 46s
py-3.9 lib-6.0 macos-latest	5m 8s
package-source	22s
py-3.9 lib-6.0 windows-latest	6m 9s
py-3.9 lib-5.1 windows-latest	3m 32s
package-wheel (macos-latest, arm64)	14m 0s
package-wheel (macos-latest, x86_64)	22m 42s
package-wheel (ubuntu-latest, i686)	16m 30s
package-wheel (ubuntu-latest, x86_64)	15m 52s
package-wheel (windows-latest, AMD64)	14m 11s
publish	35s
	1h 46m 44s

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