Merge branch '7.0' into 7.1

* 7.0:
  [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

Tests/Command/Descriptor/HtmlDescriptorTest.php

@@ -45,7 +45,7 @@ public function testItOutputsStylesAndScriptsOnFirstDescribeCall()
 
         $descriptor->describe($output, new Data([[123]]), ['timestamp' => 1544804268.3668], 1);
 
-        $this->assertStringNotMatchesFormat('<style>%A</style><script>%A</script>%A', $output->fetch(), 'styles & scripts are output only once');
+        $this->assertDoesNotMatchRegularExpression('#<style>(.*?)</style><script>(.*?)</script>(.*)#', $output->fetch(), 'styles & scripts are output only once');
     }
 
     /**