set phpversion to 8.0 if 8 is passed #55

Job	Run time
Sage Install Tests (ubuntu-latest, 8)	4m 55s
Sage Install Tests (ubuntu-latest, 8)	10m 29s
Sage Install Tests (ubuntu-latest, 8.1)	4m 59s
Sage Install Tests (ubuntu-latest, 8.1)	11m 58s
Sage Install Tests (ubuntu-latest, 8.2)	4m 50s
Sage Install Tests (ubuntu-latest, 8.2)	11m 30s
Sage Install Tests (ubuntu-latest, 8.3)	4m 52s
Sage Install Tests (ubuntu-latest, 8.3)	12m 14s
Sage Install Tests (macos-latest, 8)	4m 6s
Sage Install Tests (macos-latest, 8)	15m 47s
Sage Install Tests (macos-latest, 8.1)	4m 57s
Sage Install Tests (macos-latest, 8.1)	13m 33s
Sage Install Tests (macos-latest, 8.2)	4m 56s
Sage Install Tests (macos-latest, 8.2)	13m 58s
Sage Install Tests (macos-latest, 8.3)	4m 52s
Sage Install Tests (macos-latest, 8.3)	15m 49s
	2h 23m 45s

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