[pygobject] (4 commits) Non-fast-forward update to branch wip/gio-async-awaitable-return

[Benjamin Berg <bberg src gnome org>]

The branch 'wip/gio-async-awaitable-return' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  9ff1c62... async: Add a new async type that is an awaitable for a _fin
  797718c... cache: Resolve and store information about async functions
  2be906e... closure: Marshal async callback handler if a default value 
  aab845c... invoke: Create async helper when needed and marshal it for 

Commits added to the branch:

  0183d87... async: Add a new async type that is an awaitable for a _fin
  f0b27cc... cache: Resolve and store information about async functions
  8883c69... closure: Marshal async callback handler if a default value 
  7edb903... invoke: Create async helper when needed and marshal it for