Update README.rst with badges

README.rst

@@ -2,6 +2,8 @@
 cascade
 ===============================
 
+| |Version| |Coveralls| |Downloads|
+
 A Python library to assign river order to hydrometric networks
 
 * Documentation: https://compassinformatics.github.io/cascade/
@@ -20,3 +22,12 @@ Installation
 .. code-block:: bash
 
     pip install cascade-rivers
+
+.. |Version| image:: https://img.shields.io/pypi/v/cascade-rivers.svg
+   :target: https://pypi.python.org/pypi/cascade-rivers
+
+.. |Coveralls| image:: https://coveralls.io/repos/github/compassinformatics/cascade/badge.svg?branch=main
+    :target: https://coveralls.io/github/compassinformatics/cascade?branch=main
+
+.. |Downloads| image:: http://pepy.tech/badge/cascade-rivers
+    :target: http://pepy.tech/project/cascade-rivers