Add pypi version and supported python version to README.md on GitHub.

PiperOrigin-RevId: 305794010
Change-Id: I71625591031847bba0ce3a7fe128b08417ca754f

README.md

@@ -2,6 +2,10 @@
   <img src="https://www.tensorflow.org/images/tf_logo_social.png">
 </div>
 
+[![Python](https://img.shields.io/pypi/pyversions/tensorflow.svg?style=plastic)](https://badge.fury.io/py/tensorflow)
+[![PyPI](https://badge.fury.io/py/tensorflow.svg)](https://badge.fury.io/py/tensorflow)
+
+
 **`Documentation`** |
 ------------------- |
 [![Documentation](https://img.shields.io/badge/api-reference-blue.svg)](https://www.tensorflow.org/api_docs/) |