Include py.typed when packaging.

[clokep]

#186 added a py.typed file, but this isn't packaged automatically so other packages (which depend on setuptools-rust) are unable to take advantage of the type hints in it.

I ran python -m build before and after this change:

diff -u <(tar -tf dist/setuptools-rust-1.6.0.tar.gz) <(tar -tf dist-new/setuptools-rust-1.6.0.tar.gz)
--- /dev/fd/11	2023-05-31 09:15:26
+++ /dev/fd/12	2023-05-31 09:15:26
@@ -13,6 +13,7 @@
 setuptools-rust-1.6.0/setuptools_rust/clean.py
 setuptools-rust-1.6.0/setuptools_rust/command.py
 setuptools-rust-1.6.0/setuptools_rust/extension.py
+setuptools-rust-1.6.0/setuptools_rust/py.typed
 setuptools-rust-1.6.0/setuptools_rust/rustc_info.py
 setuptools-rust-1.6.0/setuptools_rust/setuptools_ext.py
 setuptools-rust-1.6.0/setuptools_rust/version.py

[davidhewitt]

Thanks! Could you please add a Packaging CHANGELOG entry?

[clokep]

Thanks! Could you please add a Packaging CHANGELOG entry?

Done!

[davidhewitt]

Thanks again!