Merge pull request #3 from YouweGit/feature/P002861-24-null-typing-fix

Resolve null typing issue for Datetime.

Author: leonhelmus

Ui/Component/Listing/Column/Datetime.php

@@ -67,8 +67,8 @@ public function __construct(
         BooleanUtils $booleanUtils,
         array $components = [],
         array $data = [],
-        ResolverInterface $localeResolver = null,
-        DataBundle $dataBundle = null
+        ?ResolverInterface $localeResolver = null,
+        ?DataBundle $dataBundle = null
     ) {
         $this->timezone = $timezone;
         $this->booleanUtils = $booleanUtils;