Bevy 0.16 upgrade (#24)

src/cutscene.rs

@@ -5,7 +5,7 @@ use crate::{
     tb_entities::{CameraTarget, CutsceneCamera, CutsceneCameraMovementEnd},
 };
 use bevy::prelude::*;
-use bevy_trenchbroom::class::Target;
+use bevy_trenchbroom::prelude::*;
 
 #[derive(Event, Debug)]
 pub struct StartCutscene(pub String);
@@ -96,7 +96,7 @@ fn update(
                 .lerp(camera_end.rotation, timer.fraction()),
         );
 
-        *cam.single_mut() = t;
+        let _ = cam.single_mut().map(|mut cam| *cam = t);
 
         if timer.finished() {
             cam_state.cutscene = false;