Make plugin compatible with php 7.0

classes/fetch/fetcher.php

@@ -53,7 +53,7 @@ class fetcher
     /**
      * @return \Stdclass {code, message}
      */
-    public function getLastError(): ?\Stdclass
+    public function getLastError()
     {
         return (object) $this->lastError;
     }

classes/fetch/moodlefetcher.php

@@ -35,7 +35,7 @@ abstract class moodlefetcher
         return \rtrim($CFG->labnbook_api_url, '/') . '/v1/redirect';
     }
 
-    public function getLastError(): ?\Stdclass
+    public function getLastError()
     {
         return $this->fetcher->getLastError();
     }

classes/fetch/user.php

@@ -76,7 +76,7 @@ class user extends moodlefetcher
      * @param array $teamconfig
      * @return object teamconfig
      */
-    public function useMission(int $missionId, int $courseId, string $coursename, ?int $groupId = null, array $teamconfig)
+    public function useMission($missionId, $courseId, $coursename, $groupId = null, $teamconfig)
     {
         return $this
             ->fetch(
@@ -102,7 +102,7 @@ class user extends moodlefetcher
      * @param array $teamconfig
      * @return object teamconfig
      */
-    public function updateMissionUse(int $missionId, int $courseId, string $coursename, ?int $groupId = null, array $teamconfig)
+    public function updateMissionUse($missionId, $courseId, $coursename, $groupId = null, $teamconfig)
     {
         return $this
             ->fetch(