build: add back support for python3.8 #55

Job	Run time
check-manifest	10s
test-array-libs (macos-latest, 3.12) / macos-latest py3.12 pyqt6	1m 40s
test-array-libs (macos-latest, 3.9) / macos-latest py3.9 pyqt6	1m 38s
test (macos-latest, 3.11) / macos-latest py3.11 pyqt6	53s
test (macos-latest, 3.10) / macos-latest py3.10 pyqt6	51s
test (macos-latest, 3.8) / macos-latest py3.8 pyqt6	1m 6s
test-array-libs (ubuntu-latest, 3.9) / ubuntu-latest py3.9 pyqt6	3m 26s
test-array-libs (ubuntu-latest, 3.12) / ubuntu-latest py3.12 pyqt6	3m 26s
test (ubuntu-latest, 3.10) / ubuntu-latest py3.10 pyqt6	1m 20s
test (ubuntu-latest, 3.11) / ubuntu-latest py3.11 pyqt6	54s
test (ubuntu-latest, 3.8) / ubuntu-latest py3.8 pyqt6	59s
Deploy	0s
upload_coverage / Upload coverage	17s
	16m 40s

Provide feedback