adds imageBitmap type to CanvasTexture that can be used in workers

src/textures/CanvasTexture.d.ts

@@ -22,7 +22,7 @@ export class CanvasTexture extends Texture {
 	 * @param [encoding=THREE.LinearEncoding]
 	 */
 	constructor(
-		canvas: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement,
+		canvas: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap,
 		mapping?: Mapping,
 		wrapS?: Wrapping,
 		wrapT?: Wrapping,