[gtksourceview] (2 commits) ...Merge branch 'cpp-modules' into 'master'

From: Christian Hergert <chergert src gnome org>
To: commits-list gnome org
Cc:
Subject: [gtksourceview] (2 commits) ...Merge branch 'cpp-modules' into 'master'
Date: Mon, 24 Feb 2020 21:48:05 +0000 (UTC)

Summary of changes:

  029bc5f... cpp.lang: add some C++20 keywords
  6b96e17... Merge branch 'cpp-modules' into 'master'