Added support for python 3.13 - Removed ubber bound #287

Job	Run time
test (ubuntu-20.04, 3.7)	36s
test (ubuntu-20.04, 3.8)	29s
test (ubuntu-20.04, 3.9)	28s
test (ubuntu-20.04, 3.10)	37s
test (ubuntu-20.04, 3.11)	30s
test (ubuntu-20.04, 3.12)	32s
test (ubuntu-20.04, 3.13)	42s
test (ubuntu-20.04, pypy3.8)	1m 32s
test (ubuntu-20.04, pypy3.9)	36s
test (ubuntu-20.04, pypy3.10)	52s
test (ubuntu-22.04, 3.7)	28s
test (ubuntu-22.04, 3.8)	28s
test (ubuntu-22.04, 3.9)	30s
test (ubuntu-22.04, 3.10)	24s
test (ubuntu-22.04, 3.11)	23s
test (ubuntu-22.04, 3.12)	30s
test (ubuntu-22.04, 3.13)	39s
test (ubuntu-22.04, pypy3.8)	1m 27s
test (ubuntu-22.04, pypy3.9)	45s
test (ubuntu-22.04, pypy3.10)	40s
test (macos-13, 3.7)	1m 9s
test (macos-13, 3.8)	1m 3s
test (macos-13, 3.9)	56s
test (macos-13, 3.10)	1m 10s
test (macos-13, 3.11)	1m 4s
test (macos-13, 3.12)	54s
test (macos-13, 3.13)	1m 4s
test (macos-13, pypy3.8)	1m 31s
test (macos-13, pypy3.9)	1m 11s
test (macos-13, pypy3.10)	1m 5s
test (windows-2022, 3.7)	2m 12s
test (windows-2022, 3.8)	1m 58s
test (windows-2022, 3.9)	1m 58s
test (windows-2022, 3.10)	1m 58s
test (windows-2022, 3.11)	1m 25s
test (windows-2022, 3.12)	1m 20s
test (windows-2022, 3.13)	3m 16s
test (windows-2022, pypy3.8)	2m 34s
test (windows-2022, pypy3.9)	3m 24s
test (windows-2022, pypy3.10)	2m 22s
builder_pypandoc	8s
builder_pypandoc_binary (macos-14)	42s
builder_pypandoc_binary (windows-2022)	1m 21s
builder_pypandoc_binary (ubuntu-22.04)	5m 25s
publisher_latest	0s
publisher_release	0s
	54m 18s

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