fix postal search to search just by zip

homeharvest/core/scrapers/realtor/__init__.py

@@ -573,6 +573,11 @@ class RealtorScraper(Scraper):
                     "radius": "{}mi".format(self.radius),
                 }
 
+        elif location_type == "postal_code":
+            search_variables |= {
+                "postal_code": location_info.get("postal_code"),
+            }
+
         else:  #: general search, location
             search_variables |= {
                 "city": location_info.get("city"),