old_contents: version = '1.6.6'
  revision = ''
  milestone = 'Yoitsu'
  release_number = '90'
  projectURL = 'https://syncplay.pl/'
  
new_contents: version = '1.6.7'
  revision = ' development'
  milestone = 'Yoitsu'
  release_number = '91'
  projectURL = 'https://syncplay.pl/'
  
subject: Bump version and release numbers (1.6.7, 91)