fix(commons): add None to dynamic.parameter mode typing

Author: delatrie

allure-python-commons/src/allure_commons/_allure.py

@@ -1,5 +1,5 @@
 from functools import wraps
-from typing import Any, Callable, TypeVar, overload
+from typing import Any, Callable, TypeVar, Union, overload
 
 from allure_commons._core import plugin_manager
 from allure_commons.types import LabelType, LinkType, ParameterMode
@@ -133,7 +133,7 @@ def link(url, link_type=LinkType.LINK, name=None):
         plugin_manager.hook.add_link(url=url, link_type=link_type, name=name)
 
     @staticmethod
-    def parameter(name, value, excluded=None, mode: ParameterMode = None):
+    def parameter(name, value, excluded=None, mode: Union[ParameterMode, None] = None):
         plugin_manager.hook.add_parameter(name=name, value=value, excluded=excluded, mode=mode)
 
     @staticmethod