[pygobject] (8 commits) Non-fast-forward update to branch ci-debug-build

[Christoph Reiter <creiter src gnome org>]

The branch 'ci-debug-build' 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:

  d673676... ci: build python 3.7 in debug mode

Commits added to the branch:

  e3d4123... Access abc classes through the abc module with Python 3 (*)
  6d0b387... Use timeit.default_timer() instead of the deprecated time.c (*)
  3583a25... tests: silence some deprecation warnings due to ValueArray  (*)
  a79c1e8... tests: remove some leftover debug print (*)
  83fd35d... tests: run our pytest excepthook plugin first to prevent wa (*)
  d6c5d15... tests: don't leak the file object returned by imp.find_modu (*)
  a7dec0c... ci: enable the new python 3.7 developer mode during tests (*)
  14e000f... ci: build python 2.7 and 3.7 in debug mode. Fixes #243

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