Fix phpstan issues

src/Bundle/ChillMainBundle/Doctrine/Type/NativeDateIntervalType.php

@@ -31,6 +31,9 @@ class NativeDateIntervalType extends DateIntervalType
 {
     public const FORMAT = '%rP%YY%MM%DDT%HH%IM%SS';
 
+    /**
+     * @param DateInterval|null $value
+     */
     public function convertToDatabaseValue($value, AbstractPlatform $platform)
     {
         if (null === $value) {