message: Add latest pypi version and supported python version badges to pypi project page.
diff: # ==============================================================================
  """TensorFlow is an open source machine learning framework for everyone.
  +[![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)
  +
  TensorFlow is an open source software library for high performance numerical
  computation. Its flexible architecture allows easy deployment of computation
  across a variety of platforms (CPUs, GPUs, TPUs), and from desktops to clusters
  