feat(autocomplete-matches): use virtualNode only lookups

[straker]

Autocomplete-matches uses the JavaScript DOM property .type to look at the type of input. This is trivial when you have a DOM node, but becomes a bit more complicated when you don't (e.g. AST implementations). Created a method on the VirtualNode that just returns the DOM property lookup but is expected to be overridden for other implementations.

It also tries to determine if the node is visible in the DOM, but that doesn't work for virtual node only runs, so I made it conditional on there being an actualNode to look at.

Please double check the tests that I added all the same properties when converting to queryFixture.

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[stephenmathieson]

LGTM but please wait for a review from someone with more "rules" experience.

[stephenmathieson]

LGTM. Please get an OK from @WilcoFiers first tho 😉

Resolved