Bug Fixes
* take the timezone in account on get_moon_phase ([2df588e](https://github.com/Kosmorro/lib/commit/2df588e5c13246c19b3b5828bdf58b95d11ec104))
Features
* make the date parameter optional (default value: today) ([c59b553](https://github.com/Kosmorro/lib/commit/c59b553c86999958027a7649c52811b2bc5162fd))