Support for 'ref' type fields

[Guilledorfman]

Description

Currently ref type fields return null:

else if (value instanceof admin.firestore.DocumentReference) { return null; }
See here

Expected Behavior

ref is a firebase object that has a property path that returns a string, for me personally that's all I need to be indexed to Typesense so I think working with that would be the easiest solution for now.

Metadata

Typsense Version:

"typesense": "^1.2.2",
"typesense-instantsearch-adapter": "^2.4.0"

OS:

macOS

[jasonbosco]

I've published this in v0.4.0 of the extension.