Fix deps in package.xml

Signed-off-by: Francisco Martín Rico <fmrico@gmail.com>

Author: fmrico

easynav_gridmap_maps_manager/package.xml

@@ -15,6 +15,7 @@
   <depend>std_srvs</depend>
   <depend>geometry_msgs</depend>
   <depend>easynav_common</depend>
+  <depend>easynav_core</depend>
   <depend>grid_map_ros</depend>
   <depend>grid_map_msgs</depend>
   <depend>ament_index_cpp</depend>