- Update: Bump StackBlur version

editor/external/stackblur-canvas/dist/stackblur-es.js

@@ -91,7 +91,7 @@ function processImage(img, canvas, radius, blurAlphaChannel) {
  * @param {Integer} topY
  * @param {Integer} width
  * @param {Integer} height
- * @throws {Error}
+ * @throws {Error|TypeError}
  * @returns {ImageData} See {@link https://html.spec.whatwg.org/multipage/canvas.html#imagedata}
  */
 
@@ -101,8 +101,8 @@ function getImageDataFromCanvas(canvas, topX, topY, width, height) {
     canvas = document.getElementById(canvas);
   }
 
-  if (!canvas || !('getContext' in canvas)) {
-    return;
+  if (!canvas || typeof canvas !== 'object' || !('getContext' in canvas)) {
+    throw new TypeError('Expecting canvas with `getContext` method in processCanvasRGB(A) calls!');
   }
 
   const context = canvas.getContext('2d');