Fix latest wgpu changes

wgpu/src/backend.rs

@@ -353,11 +353,13 @@ impl Backend {
                             resolve_target: None,
                             ops: wgpu::Operations {
                                 load: wgpu::LoadOp::Load,
-                                store: true,
+                                store: wgpu::StoreOp::Store,
                             },
                         },
                     )],
                     depth_stencil_attachment: None,
+                    timestamp_writes: None,
+                    occlusion_query_set: None,
                 },
             ));
         }