Release 1.0.0

[embetten]

1.0.0 release

This pull request finalizes the release of version 1.0.0

1.0.0 Announcement: #90

🔧 What’s New In v1.0.0 🔧
Removal of Python 2 Support
Python 2 reached its end of support on January 1, 2020 but 2.7 was still supported by artifacts-keyring. With this major release, we'll be requiring a Python version >=3.9 which is the minimum version that has not reached its end of support.

Platform Specific #Python
A major revision on how we publish the artifacts-keyring package will be coming, where we will now be using the cibuildwheel tooling to publish pre-built .whls for all of our supported ecosystems win-x64, osx-x64,osx-arm64,linux-x64,linux-arm64.

No .NET runtime required by default
With release 1.4.1 of artifacts-credprovider, self-contained binaries have now been published for the artifacts-credprovider plugin used by our keyring. By combining these binaries with the new platform specific distros, users on machines without .NET previously installed will be able to get running with a simple pip install artifacts-keyring command. This is especially valuable for CI environments where a .NET requirement adds extra overhead.

When a supported environment and Python tag is not found, pip tooling will install the sdist which does not include self-contained binaries and will require a corresponding .NET runtime.

Relevant issues: #97 #86 #89 #87