doc update

Author: gonzalocasas

src/compas_eve/codecs/__init__.py

@@ -53,13 +53,13 @@ def decode(self, encoded_data):
 
         Parameters
         ----------
-        encoded_data : bytes or str
+        encoded_data : bytes
             Encoded data to decode.
 
         Returns
         -------
-        dict
-            Decoded data dictionary that can be used to reconstruct a message.
+        :class:`Message` or dict or object
+            Decoded message after reconstruction from the encoded data.
         """
         raise NotImplementedError("Subclasses must implement decode()")