Bot API 5.7 and some new features (#834)

* Update API, added some new features

* Fixed unknown chat_action value

* Separate events from dispatcher messages

* Disabled cache for I18n LazyProxy

* Rework events isolation

* Added chat member status changed filter, update Bot API 5.7, other small changes

* Improve exceptions in chat member status filter

* Fixed tests, covered flags and events isolation modules

* Try to fix flake8 unused type ignore

* Fixed linter error

* Cover chat member updated filter

* Cover chat action sender

* Added docs for chat action util

* Try to fix tests for python <= 3.9

* Fixed headers

* Added docs for flags functionality

* Added docs for chat_member_updated filter

* Added change notes

* Update dependencies and fix mypy checks

* Bump version

tests/test_dispatcher/test_flags/test_getter.py

@@ -0,0 +1,64 @@
+from unittest.mock import patch
+
+import pytest
+
+from aiogram import F
+from aiogram.dispatcher.event.handler import HandlerObject
+from aiogram.dispatcher.flags.getter import (
+    check_flags,
+    extract_flags,
+    extract_flags_from_object,
+    get_flag,
+)
+
+
+class TestGetters:
+    def test_extract_flags_from_object(self):
+        def func():
+            pass
+
+        assert extract_flags_from_object(func) == {}
+
+        func.aiogram_flag = {"test": True}
+        assert extract_flags_from_object(func) == func.aiogram_flag
+
+    @pytest.mark.parametrize(
+        "obj,result",
+        [
+            [None, {}],
+            [{}, {}],
+            [{"handler": None}, {}],
+            [{"handler": HandlerObject(lambda: True, flags={"test": True})}, {"test": True}],
+        ],
+    )
+    def test_extract_flags(self, obj, result):
+        assert extract_flags(obj) == result
+
+    @pytest.mark.parametrize(
+        "obj,name,default,result",
+        [
+            [None, "test", None, None],
+            [None, "test", 42, 42],
+            [{}, "test", None, None],
+            [{}, "test", 42, 42],
+            [{"handler": None}, "test", None, None],
+            [{"handler": None}, "test", 42, 42],
+            [{"handler": HandlerObject(lambda: True, flags={"test": True})}, "test", None, True],
+            [{"handler": HandlerObject(lambda: True, flags={"test": True})}, "test2", None, None],
+            [{"handler": HandlerObject(lambda: True, flags={"test": True})}, "test2", 42, 42],
+        ],
+    )
+    def test_get_flag(self, obj, name, default, result):
+        assert get_flag(obj, name, default=default) == result
+
+    @pytest.mark.parametrize(
+        "flags,magic,result",
+        [
+            [{}, F.test, None],
+            [{"test": True}, F.test, True],
+            [{"test": True}, F.spam, None],
+        ],
+    )
+    def test_check_flag(self, flags, magic, result):
+        with patch("aiogram.dispatcher.flags.getter.extract_flags", return_value=flags):
+            assert check_flags(object(), magic) == result