Fix array syntax and linter issues

Author: m1r0

includes/rest-api/class-sensei-rest-api-course-progress-controller.php

@@ -35,7 +35,7 @@ class Sensei_REST_API_Course_Progress_Controller extends \WP_REST_Controller {
 	 *
 	 * @param string $namespace Routes namespace.
 	 */
-	public function __construct( $namespace ) {
+	public function __construct( $namespace ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.namespaceFound -- The variable name if defined in the WP_REST_Controller class.
 		$this->namespace = $namespace;
 	}
 
@@ -74,7 +74,7 @@ public function batch_delete_items( WP_REST_Request $request ) {
 			$student               = new WP_User( $student_id );
 			$result[ $student_id ] = false;
 			if ( $student->exists() ) {
-				$result[ $student_id ] = [];
+				$result[ $student_id ] = array();
 				foreach ( $course_ids as $course_id ) {
 					$result[ $student_id ][ $course_id ] = false;
 					if ( Sensei_Utils::has_started_course( $course_id, $student_id ) ) {
@@ -84,7 +84,7 @@ public function batch_delete_items( WP_REST_Request $request ) {
 			}
 		}
 
-		return new WP_REST_Response( $result, WP_HTTP::OK );
+		return new WP_REST_Response( $result, WP_Http::OK );
 	}
 
 	/**

includes/rest-api/class-sensei-rest-api-course-students-controller.php

@@ -80,7 +80,7 @@ public function batch_create_items( WP_REST_Request $request ) {
 			$user               = new WP_User( $user_id );
 			$result[ $user_id ] = false;
 			if ( $user->exists() ) {
-				$result[ $user_id ] = [];
+				$result[ $user_id ] = array();
 				foreach ( $course_ids as $course_id ) {
 					$course_enrolment                 = Sensei_Course_Enrolment::get_course_instance( $course_id );
 					$result[ $user_id ][ $course_id ] = $course_enrolment->enrol( $user_id );