Fixed Auto flags and added polygonal regions in claim command. Also removed sources from jar#23

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Qveshn wants to merge 3 commits intoShevchik:masterfrom

Commits on Oct 27, 2021

Some gradle changes (remove sources from jar, substitute in plugin.yml, improve clean task)
Qveshn
committed
Fix issue with adding auto flags in claim command (players may not have permission for these flags)
Qveshn
committed
Add the ability to claim polygonal regions who have permission "worldguard.region.unlimited"
Qveshn
committed