Simplify `no-unclosed-tag` rule#340

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AndrewJakubowicz wants to merge 3 commits intorunem:masterfrom

AndrewJakubowicz:this-tag-isnt-closed

Commits on Jan 6, 2024

Make isSelfClosed check far more specific, checking void tags and self closing syntax.
AndrewJakubowicz
committed

Commits on Jan 8, 2024

non void elements must have an explicit closing tag
AndrewJakubowicz
committed
add regression test and fix self closing custom-element in another test
AndrewJakubowicz
committed