[Merge] ~enr0n/ubuntu-release-upgrader:flatpak-quirk into ubuntu-release-upgrader:ubuntu/main

[Nick Rosbrook]

Nick Rosbrook has proposed merging ~enr0n/ubuntu-release-upgrader:flatpak-quirk into ubuntu-release-upgrader:ubuntu/main.

Requested reviews:
  Brian Murray (brian-murray)

For more details, see:
https://code.launchpad.net/~enr0n/ubuntu-release-upgrader/+git/ubuntu-release-upgrader/+merge/437751

* Add a quirk to prevent auto-removal of flatpak if it is actively used.
* Fix setup.py to create a PEP440-compliant version string.
* Add ubuntu-unity-desktop to DistUpgrade.cfg (from https://code.launchpad.net/~rs2009/ubuntu-release-upgrader/+git/ubuntu-release-upgrader/+merge/437647)
-- 
The attached diff has been truncated due to its size.
Your team Ubuntu Core Development Team is subscribed to branch ubuntu-release-upgrader:ubuntu/main.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: review-diff.txt
Type: text/x-diff
Size: 524288 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/ubuntu-reviews/attachments/20230222/781648a7/attachment-0001.diff>