Summary: Merge was stuck in merge-o-matic due to Diff3 conflict markers. Now resolved.
Test Plan: check if this is indeed correct merge according to ubuntu standards.
Reviewers: wxl, kc2bez
Reviewed By: wxl, kc2bez
Differential Revision: https://phab.lubuntu.me/D104
* Bumped compat to 11
* Bumped debhelper to >= 11~
* Removed cmake minimum version
* Bumped Standards to 4.1.4
* Changed VCS fields for salsa
* Fixed homepage and Sources url to /lxqt
* Bumped years in copyright
* Removed trailing whitespaces