Merge pull request #17 from Vincz/patch-1

Add missing nullable check

Author: jaimz22

src/Common/TsVectorSubscriber.php

@@ -88,6 +88,7 @@ public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs)
                 'type' => 'tsvector',
                 'weight' => strtoupper($annotation->weight),
                 'language' => strtolower($annotation->language),
+                'nullable' => $this->isWatchFieldNullable($class, $annotation)
             ]);
         }
     }