[CYPHER] Point should support `.height` (not just `.z`)

[ExtReMLapin]

Hello,

Right now :

        WITH point({longitude: 56.7, latitude: 12.78, height: 8}) AS p
        RETURN p.longitude AS lon, p.latitude AS lat, p.z AS z, p.crs AS crs

Works, but using height as described by neo4j doc doesn't work, it returns null

        WITH point({longitude: 56.7, latitude: 12.78, height: 8}) AS p
        RETURN p.height AS height

It returns null