chore: prepare for release

CHANGELOG.md

@@ -1,12 +0,0 @@
-# Version 0.10.0 (2021-04-03)
-
-This is the first version of the Kosmorrolib.  It is numbered "0.10.0" because directly follows the version 0.9.0 of the Kosmorro project.
-
-### 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))