fix: onMapCreated is not called (#70)

Signed-off-by: Ken Lee <38970885+mynameiskenlee@users.noreply.github.com>

Author: mynameiskenlee

packages/platform_maps_flutter_platform_interface/lib/src/platform_map.dart

@@ -43,6 +43,7 @@ class PlatformMap extends StatelessWidget {
             onCameraMove: onCameraMove,
             onCameraMoveStarted: onCameraMoveStarted,
             onLongPress: onLongPress,
+            onMapCreated: onMapCreated,
             onTap: onTap,
             padding: padding,
             polylines: polylines,