chore: bump payload version

Author: janniks

packages/auth/src/messages.ts

@@ -12,7 +12,7 @@ import {
 } from '@stacks/encryption';
 import { DEFAULT_SCOPE, AuthScope } from './constants';
 
-const VERSION = '1.3.1';
+const VERSION = '2.1.0';
 
 type AuthMetadata = {
   email?: string;