v5.0.0a1

What's Changed

• Pin coverage/coveralls version by @epsy in #67
• Doc improvements, update sphinx to 4.2.0 by @epsy in #68
• Automatically group identical subcommands as aliases by @epsy in #69
• Fix readthedocs build by @epsy in #70
• Add shared CI by @epsy in #75
• drop Python 2 support, support Python 3.10 by @epsy in #76
• Add continuous deployment and clean up a few files by @epsy in #78
• Compatibility with Docutils 0.21+ by @epsy in #81
• Use evaluated annotations from sigtools by @epsy in #83

Full Changelog: v4.2.1...v5.0.0a1