Version 1.2.2:
- Almost full coverage (and more than kcov actually reports)
- Reasonable beggining for proper CI (tests of course could be
  improved and would be better data-driven)

Version 1.0.11:
- Assuming we're hosted on a typical git hosting service with auto
  release archive generation.

Version 1.0.0:
- Initial import from msmtp https://sourceforge.net/projects/msmtp/
  with additional functionality added.
