Unconditionally set keys.

Author: rohe

src/cryptojwt/key_bundle.py

@@ -509,6 +509,9 @@ def __len__(self):
         """
         return len(self._keys)
 
+    def set(self, keys):
+        self._keys = keys
+
     def get_key_with_kid(self, kid):
         """
         Return the key that has a specific key ID (kid)