improvement: move the expected status variable to outside the global scope

Author: helderberto

src/is-created.js

@@ -1,8 +1,7 @@
 import validateHttpStatus from './validate-http-status';
 
-const EXPECTED_STATUS = 201;
-
 function isCreated(status) {
+  const EXPECTED_STATUS = 201;
   return validateHttpStatus(status, EXPECTED_STATUS);
 }