chore: release 0.12.7 #869

Job	Run time
docs	45s
doctest	1m 13s
feature-checks	3m 22s
clippy	54s
fmt	11s
test stable (ubuntu-latest)	1m 8s
test stable --all-features (ubuntu-latest)	2m 11s
test 1.83 (ubuntu-latest)	1m 13s
test stable (macos-latest)	1m 39s
test stable --all-features (macos-latest)	2m 53s
test 1.83 (macos-latest)	1m 56s
test stable (windows-latest)	4m 9s
test stable --all-features (windows-latest)	4m 45s
test 1.83 (windows-latest)	2m 43s
	29m 2s

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