Merge branch '4.4' into 5.1

* 4.4:
  [Filesystem] fix for PHP 8
  [Cache] fix DBAL v3 compat
  Bump Symfony version to 4.4.15
  Update VERSION for 4.4.14
  Update CHANGELOG for 4.4.14
  Bump Symfony version to 3.4.46
  Update VERSION for 3.4.45
  Update CONTRIBUTORS for 3.4.45
  Update CHANGELOG for 3.4.45

Author: nicolas-grekas

Store/PdoStore.php

@@ -13,7 +13,6 @@
 
 use Doctrine\DBAL\Connection;
 use Doctrine\DBAL\DBALException;
-use Doctrine\DBAL\Driver\Result;
 use Doctrine\DBAL\DriverManager;
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Schema\Schema;
@@ -163,7 +162,7 @@ public function putOffExpiration(Key $key, float $ttl)
         $result = $stmt->execute();
 
         // If this method is called twice in the same second, the row wouldn't be updated. We have to call exists to know if we are the owner
-        if (!($result instanceof Result ? $result : $stmt)->rowCount() && !$this->exists($key)) {
+        if (!(\is_object($result) ? $result : $stmt)->rowCount() && !$this->exists($key)) {
             throw new LockConflictedException();
         }
 
@@ -195,7 +194,7 @@ public function exists(Key $key)
         $stmt->bindValue(':token', $this->getUniqueToken($key));
         $result = $stmt->execute();
 
-        return (bool) ($result instanceof Result ? $result->fetchOne() : $stmt->fetchColumn());
+        return (bool) (\is_object($result) ? $result->fetchOne() : $stmt->fetchColumn());
     }
 
     /**