Version 0.9.0

This is the first release of 2021 - happy new year!

Code Refactoring

• use enum instead of dicts for the events and moon phase (#129) (8b723bf)

Continuous Integration

• compatibility: add support for Python 3.9 (#131) (0b12e71)

Features

• event: add support for moon apogee and perigee (331ab99)

BREAKING CHANGES

• compatibility: on Ubuntu 20.04+, the texlive-latex-extra package is needed to generate the PDF output
• kosmorrolib: some methods in Event and MoonPhase classes have been dropped in favor of enum.Enum's name and value properties.