Revert the behaviour of handling duplicate items

Author: JaZo

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [0.7.4] - 2018-06-20
+
+### Fixed
+
+* Reverted the behaviour of handling duplicate items back to what it was in <= 0.7.2. This change in behaviour was introduced in the last performance update (0.7.3). N.B. This change will only affect you if you parse documents with duplicate items, which violates the JSON API spec.
+
 ## [0.7.3] - 2018-06-01
 
 ### Changed

src/JsonApi/Hydrator.php

@@ -67,7 +67,7 @@ public function hydrateCollection(ResourceCollectionInterface $jsonApiCollection
      */
     public function hydrateRelationships(Collection $jsonApiItems, Collection $items)
     {
-        $keyedItems = $items->keyBy(
+        $keyedItems = $items->reverse()->keyBy(
             function (ItemInterface $item) {
                 return $this->getItemKey($item);
             }