What's Changed

• Improve the docs about syncing custom files. by @mbaechtold in #984
• Remove python 2 support by @lra in #2124
• Add typing by @lra in #2125
• Add mypy by @lra in #2126
• Update CONTRIBUTING.md by @lra in #2127
• Add architecture doc by @lra in #2128
• Improve typing of _best_config_path() by @lra in #2129
• Add test coverage by @lra in #2130

Full Changelog: 0.9.5...0.9.6