Remove PY3.8 support; Add PY3.13 support #1055

Job	Run time
linters (3.9, ubuntu-latest)	1m 56s
Testing on Python 3.9 (ubuntu-latest)	1m 52s
Testing on Python 3.9 (macos-13)	4s
Testing on Python 3.9 (windows-2019)	2m 12s
Testing on Python 3.10 (ubuntu-latest)	1m 56s
Testing on Python 3.10 (macos-13)	1m 59s
Testing on Python 3.10 (windows-2019)	2m 11s
Testing on Python 3.11 (ubuntu-latest)	1m 53s
Testing on Python 3.11 (macos-13)	1m 56s
Testing on Python 3.11 (windows-2019)	2m 21s
Testing on Python 3.12 (ubuntu-latest)	2m 6s
Testing on Python 3.12 (macos-13)	1m 53s
Testing on Python 3.12 (windows-2019)	2m 18s
Testing on Python 3.13 (ubuntu-latest)	2m 3s
Testing on Python 3.13 (macos-13)	1m 50s
Testing on Python 3.13 (windows-2019)	2m 11s
	30m 41s

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