CHANGELOG.md in plezi-0.12.20 vs CHANGELOG.md in plezi-0.12.21

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 #Change Log
 
 ***
 
+Change log v.0.12.21
+
+**Update**: Auto-Dispatch:
+
+* method whitlisting process was updates. Method arity is now reviewed, so that only methods that accept one or more parameters are recognized as websocket auto-dispatch methods (allowing for Http only methods without throwing exceptions).
+
+* client now adds helper methods for AJAJ (like AJAX, but JSON instead of XML). The javascript client supports the `client.ajaj.emit` to send AJAJ requests and the `client.ajaj.auto=true` to automatically fallback on AJAJ after timeout (unless a custom callback is defined for the specific `emit`).
+
+***
+
 Change log v.0.12.20
 
 **Fix (Client)**: The onopen callback is now called (the issue was related to a typo in the name of the onopen callback).
 
 **Updates**: Auto-Dispatch Client - logging is now easier with the `log_events` property (set to `true` to log all events).
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