Add missing return this in taggers

Author: andrerom

src/ResponseTagger/Delegator/DispatcherTagger.php

@@ -26,5 +26,7 @@ public function tag(ResponseCacheConfigurator $configurator, Response $response,
         foreach ($this->taggers as $tagger) {
             $tagger->tag($configurator, $response, $value);
         }
+
+        return $this;
     }
 }

src/ResponseTagger/Value/ContentInfoTagger.php

@@ -23,5 +23,7 @@ public function tag(ResponseCacheConfigurator $configurator, Response $response,
         if ($value->mainLocationId) {
             $configurator->addTags($response, ['location-' . $value->mainLocationId]);
         }
+
+        return $this;
     }
 }