Fix crudely for bevy 0.13

assets/canvas_shader.wgsl

@@ -1,9 +1,4 @@
-struct FragmentInput {
-    @builtin(position) fragment_coordinate: vec4<f32>,
-    @location(0) world_position: vec4<f32>,
-    @location(1) world_normal: vec3<f32>,
-    @location(2) uv: vec2<f32>,
-};
+#import bevy_sprite::mesh2d_vertex_output::VertexOutput
 
 struct TileLight {
     color: vec4<f32>,
@@ -18,11 +13,11 @@ struct CanvasMaterial {
 };
 
 
-@group(1) @binding(0)
+@group(2) @binding(0)
 var<uniform> canvas_material: CanvasMaterial;
 
 @fragment
-fn fragment(input: FragmentInput) -> @location(0) vec4<f32> {
+fn fragment(input: VertexOutput) -> @location(0) vec4<f32> {
     var output_color = canvas_material.ambient_color;
 
     var lighting = vec4<f32>();