old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # Store the version here so:
  # 1) we don't load dependencies by storing it in __init__.py
  # 2) we can import it in setup.py for the same reason
  # 3) we can import it into your module module
  # (from http://stackoverflow.com/questions/458550/)
  __version__ = '0.3.1'
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # Store the version here so:
  # 1) we don't load dependencies by storing it in __init__.py
  # 2) we can import it in setup.py for the same reason
  # 3) we can import it into your module module
  # (from http://stackoverflow.com/questions/458550/)
  __version__ = '1.0.0'
  
subject: Increment Python version to 1.0.0