Allow providing multiple values for Postal Codes.

[PawelWozniak]

Hi. Greate API. I just got a task to fill in Land names in database based on psotal code.
Using such request GET https://openplzapi.org/de/Localities?postalCode=13156 I see in reposne that list of values is returned [{...}]
can I provide then list of postal codes and get mutiple reponses in one call?
Something like GET https://openplzapi.org/de/Localities?postalCode=13156,12225` or any other format?
That would help to avoid multiple requests when checking many postal codes.