Bump version to v3.7.3 #99

Job	Run time
type-checking	20s
pre-commit	21s
docs-build	4m 57s
tests 3.12 [ubuntu-latest]	1m 2s
tests 3.11 [ubuntu-latest]	55s
tests 3.10 [ubuntu-latest]	59s
tests 3.12 [windows-latest]	2m 11s
tests 3.11 [windows-latest]	2m 0s
tests 3.10 [windows-latest]	1m 58s
tests 3.12 [macos-latest]	1m 6s
tests 3.11 [macos-latest]	1m 0s
tests 3.10 [macos-latest]	55s
tests 3.12 [macos-13]	2m 6s
tests 3.11 [macos-13]	1m 35s
tests 3.10 [macos-13]	1m 37s
tests-extended 3.12 [ubuntu-latest]	1m 3s
coverage	13s
	24m 18s

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