Log Message:
py-defusedxml: updated to 0.6.0

defusedxml 0.6.0
- Increase test coverage.
- Add badges to README.

defusedxml 0.6.0rc1
- Test on Python 3.7 stable and 3.8-dev
- Drop support for Python 3.4
- No longer pass *html* argument to XMLParse. It has been deprecated and
  ignored for a long time. The DefusedXMLParser still takes a html argument.
  A deprecation warning is issued when the argument is False and a TypeError
  when it's True.
- defusedxml now fails early when pyexpat stdlib module is not available or
  broken.
- defusedxml.ElementTree.__all__ now lists ParseError as public attribute.
- The defusedxml.ElementTree and defusedxml.cElementTree modules had a typo
  and used XMLParse instead of XMLParser as an alias for DefusedXMLParser.
  Both the old and fixed name are now available.