docs: Messages can be of any type

This was changed in v2.0.0, but these docstrings where not updated
accordingly.

pykka/_future.py

@@ -55,7 +55,7 @@ def set(self, value=None):
         Set the encapsulated value.
 
         :param value: the encapsulated value or nothing
-        :type value: any picklable object or :class:`None`
+        :type value: any object or :class:`None`
         :raise: an exception if set is called multiple times
         """
         raise NotImplementedError

pykka/_ref.py

@@ -64,7 +64,7 @@ def tell(self, message):
         block until a free slot is available.
 
         :param message: message to send
-        :type message: picklable dict
+        :type message: any
 
         :raise: :exc:`pykka.ActorDeadError` if actor is not available
         :return: nothing
@@ -77,7 +77,7 @@ def ask(self, message, block=True, timeout=None):
         """
         Send message to actor and wait for the reply.
 
-        The message must be a picklable dict.
+        The message can be of any type.
         If ``block`` is :class:`False`, it will immediately return a
         :class:`Future <pykka.Future>` instead of blocking.
 
@@ -88,7 +88,7 @@ def ask(self, message, block=True, timeout=None):
         :exc:`pykka.Timeout`.
 
         :param message: message to send
-        :type message: picklable dict
+        :type message: any
 
         :param block: whether to block while waiting for a reply
         :type block: boolean

pykka/_registry.py

@@ -30,7 +30,7 @@ def broadcast(cls, message, target_class=None):
         actors.
 
         :param message: the message to send
-        :type message: picklable dict
+        :type message: any
 
         :param target_class: optional actor class to broadcast the message to
         :type target_class: class or class name