Updated dependencies

version.php

@@ -19,12 +19,17 @@
  *
  * @package    filter
  * @subpackage opencastfilter
- * @copyright  2018 Tamara Gunkel
+ * @copyright  2018 Tamara Gunkel, 2020 Nina Herrmann
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
 defined('MOODLE_INTERNAL') || die();
 
+$plugin->maturity = MATURITY_RC;
 $plugin->version = 2018031902;        // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires = 2017050500;        // Requires this Moodle version.
 $plugin->component = 'filter_opencast'; // Full name of the plugin.
+$plugin->dependencies = array(
+    'block_opencast' => 2019052900, // Requires Block Opencast and Tool Opencast
+    'tool_opencast' => 2018102900,
+);
\ No newline at end of file