Dropped CI support for older python and pypy versions #314

Job	Run time
test (ubuntu-20.04, 3.9)	31s
test (ubuntu-20.04, 3.10)	25s
test (ubuntu-20.04, 3.11)	32s
test (ubuntu-20.04, 3.12)	26s
test (ubuntu-20.04, 3.13)	36s
test (ubuntu-20.04, pypy3.9)	1m 6s
test (ubuntu-20.04, pypy3.10)	43s
test (ubuntu-22.04, 3.9)	46s
test (ubuntu-22.04, 3.10)	43s
test (ubuntu-22.04, 3.11)	36s
test (ubuntu-22.04, 3.12)	31s
test (ubuntu-22.04, 3.13)	36s
test (ubuntu-22.04, pypy3.9)	1m 16s
test (ubuntu-22.04, pypy3.10)	41s
test (macos-13, 3.9)	50s
test (macos-13, 3.10)	58s
test (macos-13, 3.11)	1m 4s
test (macos-13, 3.12)	51s
test (macos-13, 3.13)	1m 28s
test (macos-13, pypy3.9)	59s
test (macos-13, pypy3.10)	1m 15s
test (windows-2022, 3.9)	1m 56s
test (windows-2022, 3.10)	3m 10s
test (windows-2022, 3.11)	2m 3s
test (windows-2022, 3.12)	2m 16s
test (windows-2022, 3.13)	3m 30s
test (windows-2022, pypy3.9)	2m 23s
test (windows-2022, pypy3.10)	2m 24s
builder_pypandoc	11s
builder_pypandoc_binary (macos-14)	56s
builder_pypandoc_binary (windows-2022)	1m 48s
builder_pypandoc_binary (ubuntu-22.04)	5m 43s
publisher_latest	0s
publisher_release	0s
	43m 13s

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