Changed getCacheBaseTags to use static instead of self

Ref: #96

Author: rennokki

src/Traits/QueryCacheable.php

@@ -98,7 +98,7 @@ protected function newBaseQueryBuilder()
     protected function getCacheBaseTags(): array
     {
         return [
-            (string) self::class,
+            (string) static::class,
         ];
     }
 }