Add street_address to nominatim result

[ChaelCodes]

Description

We're using nominatim and Google as backends for Geocoder. We'd like to be able to get the address, including street number. This adds a street_address method in the same style as the one for Google.

geocoder/lib/geocoder/results/google.rb

Lines 86 to 88 in 8143fce

	def street_address
	[street_number, route].compact.join(' ')
	end