chore: bump applications versions

* emqx_authz 0.1.22
* emqx_exhook 5.0.13
* emqx_utils 5.0.3

apps/emqx_utils/src/emqx_utils.app.src

@@ -2,7 +2,7 @@
 {application, emqx_utils, [
     {description, "Miscellaneous utilities for EMQX apps"},
     % strict semver, bump manually!
-    {vsn, "5.0.2"},
+    {vsn, "5.0.3"},
     {modules, [
         emqx_utils,
         emqx_utils_api,