updated README.md: added gh and pypi badges

Author: Vincent Berenz

README.md

@@ -1,3 +1,7 @@
+[![Python package](https://github.com/MPI-IS/nightskycam-scorer/actions/workflows/tests.yml/badge.svg)](https://github.com/MPI-IS/nightskycam-scorer/actions/workflows/tests.yml)
+[![PyPI version](https://img.shields.io/pypi/v/nightskycam-scorer.svg)](https://pypi.org/project/nightskycam-scorer/)
+
+
 # NightSkyCam Scorer
 
 Under construction