Update AppUninstalledJob.php (#229)

null guard against an invalid shop on uninstall

Author: andreybutov

src/Messaging/Jobs/AppUninstalledJob.php

@@ -72,6 +72,9 @@ public function handle(
 
         // Get the shop
         $shop = $shopQuery->getByDomain($this->domain);
+        if ( !$shop ) {
+            return true;
+        }
         $shopId = $shop->getId();
 
         // Cancel the current plan