fix: getImageData and bump version to 1.1.1

Author: kyranet

package.json

@@ -1,6 +1,6 @@
 {
     "name": "canvas-constructor",
-    "version": "1.1.0",
+    "version": "1.1.1",
     "description": "A ES6 class for node-canvas with built-in functions and chained methods.",
     "main": "index",
     "types": "typings/index.d.ts",

src/canvas.js

@@ -218,7 +218,7 @@ class CanvasConstructor {
 	 * @see https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/getImageData
 	 */
 	getImageData(dx = 0, dy = 0, width = this.width, height = this.height, callback) {
-		if (typeof x === 'function') {
+		if (typeof dx === 'function') {
 			callback = dx;
 			dx = 0;
 		}