Add description.

Author: dcherian

setup.py

@@ -1,4 +1,8 @@
 #!/usr/bin/env python
 from setuptools import setup
 
-setup(use_scm_version=True, setup_requires=["setuptools_scm"])
+setup(
+    use_scm_version=True,
+    setup_requires=["setuptools_scm"],
+    description="A lightweight convenience wrapper for using CF attributes on xarray objects. ",
+)