Fix phpstan errors

Author: arogachev

src/phpDocumentor/Reflection/Php/Factory/Function_.php

@@ -56,7 +56,7 @@ protected function doCreate(
             new Location($object->getLine()),
             new Location($object->getEndLine()),
             (new Type())->fromPhpParser($object->getReturnType()),
-            $object->byRef || false
+            $object->byRef ?: false
         );
 
         $file->addFunction($function);

src/phpDocumentor/Reflection/Php/Factory/Method.php

@@ -69,7 +69,7 @@ protected function doCreate(
             new Location($object->getLine()),
             new Location($object->getEndLine()),
             (new Type())->fromPhpParser($object->getReturnType()),
-            $object->byRef || false
+            $object->byRef ?: false
         );
         $methodContainer->addMethod($method);
 

src/phpDocumentor/Reflection/Php/Trait_.php

@@ -44,6 +44,9 @@ final class Trait_ implements Element, MetaDataContainerInterface
     /** @var Location */
     private $location;
 
+    /** @var Location */
+    private $endLocation;
+
     /**
      * Initializes the all properties
      */