run yapf on the code

lib/python/qmk/tests/attrdict.py

@@ -3,6 +3,7 @@ class AttrDict(dict):
 
     This should only be used to mock objects for unit testing. Please do not use this outside of qmk.tests.
     """
+
     def __init__(self, *args, **kwargs):
         super(AttrDict, self).__init__(*args, **kwargs)
         self.__dict__ = self