Add defaults for return by reference

Author: jaapio

src/phpDocumentor/Reflection/Php/Function_.php

@@ -56,7 +56,7 @@ public function __construct(
         ?DocBlock $docBlock = null,
         ?Location $location = null,
         ?Type $returnType = null,
-        bool $hasReturnByReference = null
+        bool $hasReturnByReference = false
     ) {
         if ($location === null) {
             $location = new Location(-1);

src/phpDocumentor/Reflection/Php/Method.php

@@ -72,7 +72,7 @@ public function __construct(
         bool $final = false,
         ?Location $location = null,
         ?Type $returnType = null,
-        bool $hasReturnByReference = null
+        bool $hasReturnByReference = false
     ) {
         $this->fqsen      = $fqsen;
         $this->visibility = $visibility;