* master: (111 commits)
  chore: add how to run docs locally
  Improve documentation with direct use of MkDocs (#398)
  feat(cli): add support for execution via 'python -m' (#395)
  Use built-in unittest.mock instead of third-party mock
  Skip test_ipython if IPython is not available (#397)
  Docs: Improve documentation for variables without value (#390)
  Use `open` instead of `io.open`
  Fix link typo in changelog
  Release version 0.20.0
  Don't mark wheels as universal (#387)
  Fix installing entry points
  Add encoding parameter to {get,set,unset}_key
  chore: add test with Python 3.11 (#368)
  Release version 0.19.2
  Add missing trailing newline when adding new value
  Release version 0.19.1
  Add Python 3.10 support (#359)
  CHANGELOG.md: Fix typos discovered by codespell
  Release version 0.19.0
  Allow any text stream (`IO[str]`) as `stream`
  ...