Merge branch '5.4' into 6.2

* 5.4:
  [Serializer] Fix CsvEncoder decode on empty data
  [Tests] Migrate data providers to static ones
  stop using assertObjectHasAttribute()/assertObjectHasNotAttribute()
  [Dotenv] Fix phpdoc Dotenv
  [Config] Fix phpdoc nullable
  Fix some typos

Author: nicolas-grekas

Tests/Form/DoctrineOrmTypeGuesserTest.php

@@ -35,7 +35,7 @@ public function testTypeGuesser(string $type, $expected)
         $this->assertEquals($expected, $this->getGuesser($classMetadata)->guessType('TestEntity', 'field'));
     }
 
-    public function requiredType()
+    public static function requiredType()
     {
         yield [Types::DATE_IMMUTABLE, new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', ['input' => 'datetime_immutable'], Guess::HIGH_CONFIDENCE)];
         yield [Types::DATE_MUTABLE, new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', [], Guess::HIGH_CONFIDENCE)];

Tests/ManagerRegistryTest.php

@@ -44,7 +44,8 @@ public function testResetService()
         $registry->resetManager();
 
         $this->assertSame($foo, $container->get('foo'));
-        $this->assertObjectNotHasAttribute('bar', $foo);
+        $this->assertInstanceOf(\stdClass::class, $foo);
+        $this->assertFalse(property_exists($foo, 'bar'));
     }
 
     /**