Bump the Version to v20.0.1

Summary: Bump the version to release a new version with the bug fix.

Reviewed By: yoongyj, liliarizona

Differential Revision: D61582701

fbshipit-source-id: 1e44ecadc8b78f62ae9752c61196c904850839a3

src/FacebookAds/ApiConfig.php

@@ -10,6 +10,6 @@
 namespace FacebookAds;
 class ApiConfig {
   const APIVersion = '20.0';
-  const SDKVersion = '20.0.0';
+  const SDKVersion = '20.0.1';
   const TYPE_CHECKER_STRICT_MODE = false;
 }