Update jaraco-windows to 3.9.2

Also updates:
- importlib-metadata-0.7
- jaraco-windows
- jaraco.classes-1.5
- jaraco.collections-1.6.0
- jaraco.functools-1.20
- jaraco.structures-1.1.2
- jaraco.text-1.10.1
- jaraco.ui-1.6
- more-itertools-4.3.0
- path.py-11.5.0
- six-1.12.0

libs/jaraco/classes/properties.py

@@ -2,8 +2,10 @@ from __future__ import unicode_literals
 
 import six
 
+__metaclass__ = type
 
-class NonDataProperty(object):
+
+class NonDataProperty:
 	"""Much like the property builtin, but only implements __get__,
 	making it a non-data property, and can be subsequently reset.
 
@@ -34,7 +36,7 @@ class NonDataProperty(object):
 
 
 # from http://stackoverflow.com/a/5191224
-class ClassPropertyDescriptor(object):
+class ClassPropertyDescriptor:
 
 	def __init__(self, fget, fset=None):
 		self.fget = fget