Bevy 0.16 upgrade (#24)

src/loading_map.rs

@@ -1,6 +1,7 @@
 use crate::{GameState, physics_layers::GameLayer};
 use avian3d::prelude::*;
-use bevy::{prelude::*, scene::SceneInstanceReady};
+use bevy::prelude::*;
+use bevy_trenchbroom::physics::SceneCollidersReady;
 
 pub fn plugin(app: &mut App) {
     app.add_systems(OnEnter(GameState::MapLoading), setup_scene);
@@ -13,7 +14,8 @@ fn setup_scene(mut commands: Commands, asset_server: Res<AssetServer>) {
             SceneRoot(asset_server.load("maps/map1.map#Scene")),
         ))
         .observe(
-            |_t: Trigger<SceneInstanceReady>, mut next_game_state: ResMut<NextState<GameState>>| {
+            |_t: Trigger<SceneCollidersReady>,
+             mut next_game_state: ResMut<NextState<GameState>>| {
                 info!("map loaded");
 
                 next_game_state.set(GameState::Playing);