[gobject-introspection] (3 commits) Non-fast-forward update to branch drop-python2-support

[Christoph Reiter <creiter src gnome org>]

The branch 'drop-python2-support' 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:

  251ffcb... Drop Python 2 support, require Python 3.4+

Commits added to the branch:

  fc1220c... flake8 updates, fixes "make check.quality" (*)
  a46e8bb... Merge branch 'flake8-updates' into 'master' (*)
  f4b6d4c... Drop Python 2 support, require Python 3.4+

(*) This commit already existed in another branch; no separate mail sent