[gimp-macos-build] (11 commits) Non-fast-forward update to branch hardened-runtime

[Alex Samorukov <asamorukov src gnome org>]

The branch 'hardened-runtime' 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:

  de587e3... Add information about notarized build

Commits added to the branch:

  948b129... Fix the build (*)
  fc1d17e... Attempt to fix the build (*)
  cf9ae7f... Remove cache (*)
  e65782a... Install python3 instead of building it (*)
  44cc40d... Remove pipenv enforcment (*)
  309abae... use python 3.6 instead (*)
  10e0c51... Try to build p3 instead :-/ (*)
  431b30e... readd pipenv (*)
  493e70b... Disable itstool workaround (*)
  bfac63c... Increment boostrap version to downgrade pango (*)
  516dd64... Update readme (*)

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