Version bump crossbeam-channel.

rtiow/src/renderer.rs

@@ -282,7 +282,7 @@ pub fn render(scene: Scene, output_dir: &Path) -> std::result::Result<(), std::i
     let mut img = RgbImage::new(scene.width as u32, scene.height as u32);
     let total = scene.width * scene.height;
     let mut last_progress = 1000;
-    for (i, resp) in pixel_resp_rx.enumerate() {
+    for (i, resp) in pixel_resp_rx.iter().enumerate() {
         let y_inv = scene.height - resp.y - 1;
         img.put_pixel(
             resp.x as u32,