Merge branch '9.19' into 10.0

Author: GrahamCampbell

src/Model/Project.php

@@ -1114,7 +1114,7 @@ public function removeSnippet(int $id)
     }
 
     /**
-     * @param int|string $group_id
+     * @param int $group_id
      *
      * @return Group
      */

src/Model/User.php

@@ -215,7 +215,7 @@ public function removeKey(int $id)
     }
 
     /**
-     * @param int|string $group_id
+     * @param int $group_id
      * @param int        $access_level
      *
      * @return User
@@ -228,7 +228,7 @@ public function addToGroup($group_id, int $access_level)
     }
 
     /**
-     * @param int|string $group_id
+     * @param int $group_id
      *
      * @return bool
      */