Fix lint issues.

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 120

packageversion/__init__.py

@@ -18,17 +18,16 @@
 
 """
 
-from typing import Any, Callable, Optional
 import importlib.metadata
-from pathlib import Path
 from collections import defaultdict
-
+from pathlib import Path
+from typing import Any, Callable, Optional
 
 __package_versions = defaultdict(lambda: "unknown")
 """
 A dictionary of package versions that have been found and cached.
- 
-This is managed by `__get_package_version` whose existence is hidden behind 
+
+This is managed by `__get_package_version` whose existence is hidden behind
 :py:func:`~getattr_with_version`.
 """