Add missing param to JsDoc

Author: grassator

lib/CanvasTextEditor.js

@@ -394,6 +394,7 @@ CanvasTextEditor.prototype.getDocument = function() {
  * Resizes editor to provided dimensions.
  * @param  {Number} width 
  * @param  {Number} height
+ * @param  {Number} dpr device pixel ratio
  */
 CanvasTextEditor.prototype.resize = function(width, height, dpr) {
   this.canvas.width = width * dpr;