Ignore type errors when setting class attributes

Author: grantjenks

diskcache/fanout.py

@@ -664,4 +664,4 @@ def index(self, name):
             return index
 
 
-FanoutCache.memoize = Cache.memoize
+FanoutCache.memoize = Cache.memoize  # type: ignore

diskcache/persistent.py

@@ -591,7 +591,7 @@ def rotate(self, steps=1):
                 else:
                     self.append(value)
 
-    __hash__ = None
+    __hash__ = None  # type: ignore
 
     @contextmanager
     def transact(self):
@@ -1033,7 +1033,7 @@ def items(self):
         """
         return ItemsView(self)
 
-    __hash__ = None
+    __hash__ = None  # type: ignore
 
     def __getstate__(self):
         return self.directory