Update Ultimate Member to version 2.10.2 with filesystem fixes

Introduced `maybe_init_wp_filesystem` for better WP_Filesystem initialization and added new utility methods like `remove_dir`. Improved cache handling and documentation annotations for several methods. These changes enhance file management and ensure smoother integration.

includes/common/class-users.php

@@ -216,6 +216,8 @@ class Users {
 	/**
 	 * Reset User cache
 	 *
+	 * @since 2.8.7
+	 *
 	 * @param int $user_id User ID.
 	 */
 	public function remove_cache( $user_id ) {