Merge pull request #7 from KrisHarris/master

Update CarbonHandler.php

src/AutumnDev/JMS/CarbonHandler.php

@@ -34,7 +34,7 @@ public function __construct($defaultFormat = DateTime::ISO8601, $defaultTimezone
 		$this->xmlCData = $xmlCData;
 	}
 
-	public static function getSubscribingMethods()
+	public static function getSubscribingMethods(): array
 	{
 		$methods = [];
 		$deserialisationTypes = ['Carbon', 'CarbonImmutable', Carbon::class, CarbonImmutable::class];