[pygobject] NEWS: Add a note on how to handle keeping an old release for py2 around

[Christoph Reiter <creiter src gnome org>]

commit bfa56b2873485e321400c1ee9af338a25304c721
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Thu Apr 16 19:42:40 2020 +0200

    NEWS: Add a note on how to handle keeping an old release for py2 around
    
    This should help distros update to the new version even if they have
    to still support Python 2.
    
    If there are any open questions please add something in #392
    
    Fixes #392

 NEWS | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/NEWS b/NEWS
index da29933f..da66ed36 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,18 @@
 
 Python 2 is no longer supported.
 
+Note for distros/packagers:
+    In case you want to keep Python 2 support you'll likely split any existing
+    package into a Python 2 and 3 version. Since these aren't parallel installable
+    here are some recommendations on how to make it work:
+
+    * Build the devel package from the Python 3 source package
+    * Drop the headers/.pc files from the Python 2 build/package
+    * Make sure no Python 2 using package depends on the devel package
+      (@Arch: gnumeric can be build without Python support for example)
+
+    See :issue:`392` for details
+
 
 3.36.0 - 2020-03-08
 -------------------