Update zoom param

src/Point.php

@@ -19,12 +19,12 @@ class Point extends Data
         ]);
     }
 
-    public function markerUrl(): string
+    public function markerUrl(string $zoom = 20): string
     {
         return '/osm-static-maps/?' . http_build_query([
             'geojson' => json_encode(['type' => 'Point', 'coordinates' => [$this->lon, $this->lat]]),
-            'zoom' => 20,
-            'maxZoom' => 20,
+            'zoom' => $zoom,
+            'maxZoom' => $zoom,
         ]);
     }
 }