v1.0.2

• Merges Heroku upstream changes, in particular:
  • Support for Python 2.7.8
  • Support for setuptools 5.4.1
  • Improved Python 3 compatibility
  • Solves readonly failures
  • Adds crypto support
    (https://www.pivotaltracker.com/story/show/76112924)
• Bumps CF testing libraries