• add some documentation to Dist::Zilla::App::Tester (thanks, Alberto
  Simões!)
  
• optimizations to regex munging (thanks, Olivier Mengué!)
  
• add x_serialization_backend to META.* files (thanks, Karen
  Etheridge!)
  
• metadata plugins are called before metadata defaults are built
  (thanks, Karen Etheridge!)
  
• don't use ExtraTests plugin, but if you do, its generated test files
  are a bit faster when unused