Essentially a bugfix release.

• Fixed Cuiaba City calendar (Brazil), adding Easter Sunday, Corpus Christi and Good Friday, thx @leogregianin (Update Cuiaba-Brazil holidays #642).
• Fix Catalonian calendar: add missing St John the Baptist public holiday, thx @lozlow (Add St John the Baptist day for Catalonian calendar #643).

Release tasks

• Commit for the tag:
  • Edit version in setup.cfg
  • Add version in Changelog.md ; trim things
  • Push & wait for the tests to be green
  • tag me.
  • build sdist + wheel packages (make package)
• Back to dev commit:
  • Edit version in setup.cfg
  • Add the "master / nothing to see here" in Changelog.md
  • Push & wait for the tests to be green
• Merge --ff
• Github stuff
  • Push tag in Github
  • Edit release on Github using the changelog.
  • Delete branch
• upload release on PyPI using twine
• (optional) Make feeback on the various PR or issues.