Fix type hints.

Author: domdfcoding

flake8_encodings/__init__.py

@@ -39,7 +39,7 @@
 import configparser
 import pathlib
 import tempfile
-from typing import Iterator, List, Optional, Tuple, Type
+from typing import Callable, Iterator, List, Optional, Tuple, Type
 
 # 3rd party
 import flake8_helper
@@ -184,6 +184,8 @@ def check_pathlib_encoding(self, node: ast.Call, method_name: str):
 		.. versionadded:: 0.3.0
 		"""
 
+		function: Callable
+
 		if method_name == "open":
 			no_encoding = ENC021
 			encoding_none = ENC022