0.9.1

• Fix a bug on Python 3.7 where gunicorn with gevent would cause the SDK to
  leak event data between requests.
• Fix a bug where the GNU backtrace integration would not parse certain frames.
• Fix a bug where the SDK would not pick up request bodies for Django Rest
  Framework based apps.
• Remove a few more headers containing sensitive data per default.
• Various improvements to type hints. Thanks Ran Benita!
• Add a event hint to access the log record from before_send.
• Fix a bug that would ignore __tracebackhide__. Thanks Matt Millican!
• Fix distribution information for mypy support (add py.typed file). Thanks
  Ran Benita!