Plugin rewritten from ground up

Version 2.0

assets/kirki/controls/php/class-kirki-control-upload.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * Customizer Control: image.
+ *
+ * @package     Kirki
+ * @subpackage  Controls
+ * @copyright   Copyright (c) 2017, Aristeides Stathopoulos
+ * @license    https://opensource.org/licenses/MIT
+ * @since       3.0.23
+ */
+
+/**
+ * Adds the image control.
+ */
+class Kirki_Control_Upload extends WP_Customize_Upload_Control {
+
+	/**
+	 * Whitelisting the "required" argument.
+	 *
+	 * @since 3.0.17
+	 * @access public
+	 * @var array
+	 */
+	public $required = array();
+
+	/**
+	 * Refresh the parameters passed to the JavaScript via JSON.
+	 *
+	 * @since 3.0.23
+	 *
+	 * @uses WP_Customize_Media_Control::to_json()
+	 */
+	public function to_json() {
+		parent::to_json();
+		$this->json['required'] = $this->required;
+	}
+}