Polyfill ImageData in Node.js environments

Given that `ImageData` has been supported for many years in all browsers, see [MDN](https://developer.mozilla.org/en-US/docs/Web/API/ImageData#browser_compatibility), we have a `typeof` check that's only necessary in Node.js environments.
Since the `@napi-rs/canvas` package provides that functionality, we can thus add an `ImageData` polyfill which allows us to ever so slightly simplify the code.

Author: Snuffleupagus

src/display/canvas.js

@@ -586,7 +586,7 @@ class CanvasExtraState {
 }
 
 function putBinaryImageData(ctx, imgData) {
-  if (typeof ImageData !== "undefined" && imgData instanceof ImageData) {
+  if (imgData instanceof ImageData) {
     ctx.putImageData(imgData, 0, 0);
     return;
   }

src/display/node_utils.js

@@ -51,6 +51,13 @@ if (
       warn("Cannot polyfill `DOMMatrix`, rendering may be broken.");
     }
   }
+  if (!globalThis.ImageData) {
+    if (canvas?.ImageData) {
+      globalThis.ImageData = canvas.ImageData;
+    } else {
+      warn("Cannot polyfill `ImageData`, rendering may be broken.");
+    }
+  }
   if (!globalThis.Path2D) {
     if (canvas?.Path2D) {
       globalThis.Path2D = canvas.Path2D;