Support empy4 and empy3 #538

Job	Run time
bootstrap / setup	4s
pytest / setup	5s
bootstrap / bootstrap (macos-latest, 3.8)	43s
bootstrap / bootstrap (macos-latest, 3.9)	20s
bootstrap / bootstrap (macos-latest, 3.10)	38s
bootstrap / bootstrap (macos-latest, 3.11)	49s
bootstrap / bootstrap (macos-latest, 3.12)	39s
bootstrap / bootstrap (ubuntu-latest, 3.8)	48s
bootstrap / bootstrap (ubuntu-latest, 3.9)	19s
bootstrap / bootstrap (ubuntu-latest, 3.10)	53s
bootstrap / bootstrap (ubuntu-latest, 3.11)	52s
bootstrap / bootstrap (ubuntu-latest, 3.12)	55s
bootstrap / bootstrap (windows-latest, 3.8)	1s
bootstrap / bootstrap (windows-latest, 3.9)	1s
bootstrap / bootstrap (windows-latest, 3.10)	1s
bootstrap / bootstrap (windows-latest, 3.11)	1s
bootstrap / bootstrap (windows-latest, 3.12)	1s
bootstrap / bootstrap (ubuntu-20.04, 3.6)	56s
pytest / pytest (macos-latest, 3.8)	57s
pytest / pytest (macos-latest, 3.9)	49s
pytest / pytest (macos-latest, 3.10)	47s
pytest / pytest (macos-latest, 3.11)	50s
pytest / pytest (macos-latest, 3.12)	50s
pytest / pytest (ubuntu-latest, 3.8)	56s
pytest / pytest (ubuntu-latest, 3.9)	52s
pytest / pytest (ubuntu-latest, 3.10)	58s
pytest / pytest (ubuntu-latest, 3.11)	55s
pytest / pytest (ubuntu-latest, 3.12)	56s
pytest / pytest (windows-latest, 3.8)	43s
pytest / pytest (windows-latest, 3.9)	42s
pytest / pytest (windows-latest, 3.10)	52s
pytest / pytest (windows-latest, 3.11)	43s
pytest / pytest (windows-latest, 3.12)	42s
pytest / pytest (ubuntu-20.04, 3.6)	53s
	21m 31s

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