fix: Fix nullable collection on Geocoder::reverse

This fix is from @rewebcan, see PR cheesegrits#106 on original repo.

src/Helpers/Geocoder.php

@@ -126,7 +126,7 @@ public function geocodeQuery(string $address): Collection
 
     public function reverse(array|string $lat, ?string $lng = null): string
     {
-        $result = $this->reverseQuery(MapsHelper::getLatLng($lat, $lng))->first();
+        $result = $this->reverseQuery(MapsHelper::getLatLng($lat, $lng))?->first();
 
         if ($result) {
             return $result->getFormattedAddress();