[3.0] Bot API 5.1 + FSM + Utils (#525)

* Regenerate corresponding to Bot API 5.1

* Added base of FSM. Markup constructor and small refactoring

* Fix dependencies

* Fix mypy windows error

* Move StatesGroup.get_root() from meta to class

* Fixed chat and user constraints

* Update pipeline

* Remove docs pipeline

* Added GLOBAL_USER FSM strategy

* Reformat code

* Fixed Dispatcher._process_update

* Bump Bot API 5.2. Added integration with MagicFilter

* Coverage

docs2/dispatcher/class_based_handlers/chat_member.rst

@@ -0,0 +1,28 @@
+=================
+ChatMemberHandler
+=================
+
+There is base class for chat member updated events.
+
+Simple usage
+============
+
+.. code-block:: python
+
+    from aiogram.handlers import ChatMemberHandler
+
+    ...
+
+    @router.chat_member()
+    @router.my_chat_member()
+    class MyHandler(ChatMemberHandler):
+        async def handle(self) -> Any: ...
+
+
+Extension
+=========
+
+This base handler is subclass of :ref:`BaseHandler <cbh-base-handler>` with some extensions:
+
+- :code:`self.chat` is alias for :code:`self.event.chat`
+