0.7.7

Version 0.7.7
https://github.com/edgewall/genshi/releases/tag/0.7.7
(Apr 21 2022, from branches/stable/0.7.x)

• Declared setuptools as the build backend (#65 by Jason R. Coombs)
• Fixed deprecation warnings caused by escape sequences in regex pattern
  strings (#63 by Jan Vollmer)