Make set_version.py compatible with Cargo.lock

[JuniorJPDJ]

Hello! I'd like to use this script for packaging this library in Alpine Linux.
I'd like to run maturin with --locked, but setting version to other than locked one makes cargo fail.

Could you please extend regexp a bit so it also catches the name so we can call script twice (for Cargo.toml and Cargo.lock) and make use of --locked?

[messense]

You can run cargo update -p watchfiles_rust_notify after set_version.py, we do it this way on CI.

watchfiles/.github/workflows/ci.yml

Lines 180 to 186 in 305de4a

	- name: set package version
	run: python .github/set_version.py
	if: "startsWith(github.ref, 'refs/tags/')"
	- name: Sync Cargo.lock
	run: cargo update -p watchfiles_rust_notify
	if: "startsWith(github.ref, 'refs/tags/')"

[samuelcolvin]

I've got rid of the set-version thing in preparation for v1, see #309.