Replace assertDictContainsSubset #105

Job	Run time
Build extra arch aarch64 wheels	1h 53m 31s
Build wheels ubuntu-20.04 (x86_64)	19m 26s
Build source distribution	11s
Build wheels ubuntu-20.04 (PyPy)	1m 3s
Build wheels windows-latest (win64)	21m 11s
Build wheels windows-latest (PyPy)	4m 47s
Build wheels macos-latest (all)	18m 48s
Build wheels macos-13 (all)	6h 0m 14s
Build wheels macos-latest (PyPy)	1m 21s
upload_pypi	0s
	9h 0m 32s

Provide feedback