While improving treesit-things for ts-modes,
I hesitated to change js--treesit-thing-settings,
but now don't see a problem with adapting the same rule
as already used by c-ts-mode for a long time that
matches all nodes except "{" "}" "[" "]" "(" ")" ",".

The problem is that the existing 'js--treesit-sexp-nodes'
is a list of nodes joined together by 'js--regexp-opt-symbol',
whereas the new definition is a sexp matcher.

Therefore we could make the internal variable
'js--treesit-sexp-nodes' obsolete like in this patch: