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/meta.py

@@ -6,6 +6,7 @@ Some useful metaclasses.
 
 from __future__ import unicode_literals
 
+
 class LeafClassesMeta(type):
 	"""
 	A metaclass for classes that keeps track of all of them that