Andreas Kling cf60f52a78 LibWeb: Add DOM tree version counter ...

This patch adds a u64 version counter to DOM::Document that increments
whenever the tree structure changes (via node insertion or removal),
or an element attribute is changed somehow.

This will be used as a crude invalidation mechanism for HTMLCollection
to cache its elements.

2024-03-19 20:59:36 +01:00

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