Prepare for release 23.4.1 (#365)

Author: AlexWaygood

CHANGELOG.md

@@ -1,10 +1,11 @@
 # Change Log
 
-## Unreleased
+## 23.4.1
 
 New error codes:
 * Y055: Unions of the form `type[X] | type[Y]` can be simplified to `type[X | Y]`.
   Similarly, `Union[type[X], type[Y]]` can be simplified to `type[Union[X, Y]]`.
+  Contributed by [tomasr8](https://github.com/tomasr8).
 
 ## 23.4.0
 

pyi.py

@@ -39,7 +39,7 @@ def unparse(node: ast.AST) -> str:
     # and mypy thinks typing_extensions is part of the stdlib.
     from typing_extensions import Literal, TypeAlias, TypeGuard
 
-__version__ = "23.4.0"
+__version__ = "23.4.1"
 
 LOG = logging.getLogger("flake8.pyi")
 FLAKE8_MAJOR_VERSION = flake8.__version_info__[0]