PyO3/setuptools-rust v1.1.1 on GitHub

1.1.1

Fix regression from setuptools-rust 1.1.0 which broke builds for the x86_64-unknown-linux-musl target. #194
Fix --target command line option being unable to take a value. #195
Fix regression from setuptools-rust 1.0.0 which broke builds on arm64 macos conda builds. #196
Fix regression from setuptools-rust 1.1.0 which incorrectly converted library extension suffixes to the "abi3" suffix when py_limited_api was unspecified. #197