Update README.md (#33)

* Update README.md

* Update README.md

* Update README.md

* Update README.md

Co-authored-by: Winfried Lötzsch <[email protected]>

Co-authored-by: Winfried Lötzsch <[email protected]>

README.md

@@ -4,10 +4,13 @@
 
 **Share, load, and transform data in a collaborative, flexible, and efficient way**
 
-[![PyPI](https://badge.fury.io/py/squirrel-core.svg)](https://badge.fury.io/py/squirrel-core)
-[![Downloads](https://static.pepy.tech/personalized-badge/squirrel-core?period=total&units=international_system&left_color=grey&right_color=blue&left_text=Downloads)](https://pepy.tech/project/squirrel-core)
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
+[![Python](https://img.shields.io/pypi/pyversions/squirrel-core.svg?style=plastic)](https://badge.fury.io/py/squirrel-core)
+[![PyPI](https://img.shields.io/pypi/v/squirrel-core?label=pypi%20package)](https://pypi.org/project/squirrel-core/)  
+[![Conda](https://img.shields.io/conda/vn/conda-forge/squirrel-core)](https://anaconda.org/conda-forge/squirrel-core)
 [![Documentation Status](https://readthedocs.org/projects/squirrel-core/badge/?version=latest)](https://squirrel-core.readthedocs.io/en/latest)
+[![Downloads](https://static.pepy.tech/personalized-badge/squirrel-core?period=total&units=international_system&left_color=grey&right_color=blue&left_text=Downloads)](https://pepy.tech/project/squirrel-core)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://raw.githubusercontent.com/merantix-momentum/squirrel-core/main/LICENSE)
+[![DOI](https://zenodo.org/badge/458099869.svg)](https://zenodo.org/badge/latestdoi/458099869)
 [![Generic badge](https://img.shields.io/badge/Website-Merantix%20Momentum-blue)](https://merantix-momentum.com)
 [![Slack](https://img.shields.io/badge/slack-chat-green.svg?logo=slack)](https://join.slack.com/t/squirrel-core/shared_invite/zt-14k6sk6sw-zQPHfqAI8Xq5WYd~UqgNFw)
 
@@ -67,6 +70,7 @@ If you use Squirrel in your research, please cite it using:
   title={Squirrel: A Python library that enables ML teams to share, load, and transform data in a collaborative, flexible, and efficient way.},
   author={Squirrel Developer Team},
   journal={GitHub. Note: https://github.com/merantix-momentum/squirrel-core},
+  doi={10.5281/zenodo.6418280},
   year={2022}
 }
 ```