Merge branch '6.4' into 7.0

* 6.4:
  [Serializer] Improve exception message in UnwrappingDenormalizer
  [PropertyInfo] Update DoctrineExtractor for new DBAL 4 BIGINT type
  Update security.nl.xlf
  [Validator] IBAN Check digits should always between 2 and 98
  [Security] Populate translations for trans-unit 20
  add missing plural translation messages
  filter out empty HTTP header parts
  [String] Fix folded in compat mode
  Remove calls to `getMockForAbstractClass()`
  [ErrorHandler] Do not call xdebug_get_function_stack() with xdebug >= 3.0 when not in develop mode
  [Serializer] Fix type for missing property
  add test for JSON response with null as content
  [Filesystem] Fix dumpFile `stat failed` error hitting custom handler
  Return false in isTtySupported() when open_basedir restrictions prevent access to /dev/tty.
  Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`
  [PhpUnitBridge] Fix `DeprecationErrorHandler` with PhpUnit 10

Author: fabpot

Tests/Definition/BaseNodeTest.php

@@ -36,7 +36,36 @@ public function testGetPathForChildNode(string $expected, array $params)
             }
         }
 
-        $node = $this->getMockForAbstractClass(BaseNode::class, $constructorArgs);
+        $node = new class(...$constructorArgs) extends BaseNode {
+            protected function validateType($value): void
+            {
+            }
+
+            protected function normalizeValue($value)
+            {
+                return null;
+            }
+
+            protected function mergeValues($leftSide, $rightSide)
+            {
+                return null;
+            }
+
+            protected function finalizeValue($value)
+            {
+                return null;
+            }
+
+            public function hasDefaultValue(): bool
+            {
+                return true;
+            }
+
+            public function getDefaultValue()
+            {
+                return null;
+            }
+        };
 
         $this->assertSame($expected, $node->getPath());
     }