migratetion to 0.18.0

src/world/tiles/visibility.rs

@@ -67,7 +67,7 @@ pub fn compute_visibility_of_game_entities(
         });
 }
 
-#[derive(Event)]
+#[derive(Message)]
 pub struct TileOcclusionEvent {
     pub tile_position: IVec3,
 }
@@ -76,7 +76,7 @@ pub fn handle_tile_occlusion_updates(
     mut tilemap: ResMut<TileMap>,
     mut floor_tiles: Query<(Entity, &mut FloorTile, &Transform)>,
     mut cwss: ResMut<CurrentWorldSpriteState>,
-    mut events: EventReader<TileOcclusionEvent>,
+    mut events: MessageReader<TileOcclusionEvent>,
 ) {
     let start = Instant::now();