Keep 18 compatibility

Signed-off-by: Julius Härtl <jus@bitgrid.net>

lib/Db/CardMapper.php

@@ -26,7 +26,6 @@ namespace OCA\Deck\Db;
 use OCP\AppFramework\Db\Entity;
 use OCP\AppFramework\Db\QBMapper;
 use OCP\DB\QueryBuilder\IQueryBuilder;
-use OCP\Diagnostics\IQuery;
 use OCP\IDBConnection;
 use OCP\IUserManager;
 use OCP\Notification\IManager;
@@ -216,8 +215,8 @@ class CardMapper extends QBMapper implements IPermissionMapper {
 		$qb->select('id,title,duedate,notified')
 			->from('deck_cards')
 			->where($qb->expr()->lt('duedate', $qb->createFunction('NOW()')))
-			->andWhere($qb->expr()->eq('archived', false))
-			->andWhere($qb->expr()->eq('deleted_at', 0));
+			->andWhere($qb->expr()->eq('archived', $qb->createNamedParameter(false, IQueryBuilder::PARAM_BOOL)))
+			->andWhere($qb->expr()->eq('deleted_at', $qb->createNamedParameter(0, IQueryBuilder::PARAM_INT)));
 		return $this->findEntities($qb);
 	}
 

lib/Db/StackMapper.php

@@ -41,7 +41,7 @@ class StackMapper extends DeckMapper implements IPermissionMapper {
 	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
 	 * @throws \OCP\AppFramework\Db\DoesNotExistException
 	 */
-	public function find($id) {
+	public function find($id): Stack {
 		$sql = 'SELECT * FROM `*PREFIX*deck_stacks` ' .
 			'WHERE `id` = ?';
 		return $this->findEntity($sql, [$id]);