Update to PyO3 0.27 #609

Job	Run time
Run cargo fmt	7s
Build splashsurf_lib with all features	3m 33s
Check and build entire workspace	3m 36s
Build splashsurf_lib with no default features	1m 8s
Build & test release mode (macos-14)	5m 2s
Build & test release mode (ubuntu-latest)	4m 8s
Build & test release mode (macos-13)	8m 48s
Build & test release mode (ubuntu-24.04-arm)	4m 14s
Build & test release mode (windows-latest)	8m 43s
Publish to crates.io	0s
	39m 19s

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