Update vendored windows libs

libs/win/path/classes.py

@@ -0,0 +1,27 @@
+import functools
+
+
+class ClassProperty(property):
+    def __get__(self, cls, owner):
+        return self.fget.__get__(None, owner)()
+
+
+class multimethod:
+    """
+    Acts like a classmethod when invoked from the class and like an
+    instancemethod when invoked from the instance.
+    """
+
+    def __init__(self, func):
+        self.func = func
+
+    def __get__(self, instance, owner):
+        """
+        If called on an instance, pass the instance as the first
+        argument.
+        """
+        return (
+            functools.partial(self.func, owner)
+            if instance is None
+            else functools.partial(self.func, owner, instance)
+        )