Fix type annotation for errors parameter to accept list return types (#364)

* Initial plan

* Fix type annotation for errors parameter to accept list return types. fixes #363

Co-authored-by: mozillazg <485054+mozillazg@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mozillazg <485054+mozillazg@users.noreply.github.com>

Author: Copilot

pypinyin/converter.pyi

@@ -9,7 +9,7 @@ from pypinyin.constants import Style
 
 
 TStyle = Style
-TErrors = Union[Callable[[Text], Text], Text]
+TErrors = Union[Callable[[Text], Union[Text, List[Text], List[List[Text]], None]], Text]
 TPinyinResult = List[List[Text]]
 TErrorResult = Union[Text, List[Text], None]
 TNoPinyinResult = Union[TPinyinResult, List[Text], Text, None]

pypinyin/core.pyi

@@ -11,7 +11,7 @@ from pypinyin.converter import Converter
 
 
 TStyle = Union[Style, Text]
-TErrors = Union[Callable[[Text], Text], Text]
+TErrors = Union[Callable[[Text], Union[Text, List[Text], List[List[Text]], None]], Text]
 TPinyinResult = List[List[Text]]