update TODO

Signed-off-by: Grant Ramsay <seapagan@gmail.com>

Author: seapagan

TODO.md

@@ -13,5 +13,7 @@ These below are from Issues or PRs in the original repository.
 - add an option to have a separate logging file for cache hits and misses?
 - remove creating a test Redis from `redis.py`. This should not be done in the
   production logic, but set up in the test logic.
-- add a `cache_key` parameter to the `cache` decorator to allow for custom
-  cache keys
+- add a `cache_key` or `tag` parameter to the `cache` decorator to allow for
+  custom cache keys
+- remove the FakeRedis from the `_connect_` function. This should be set up in
+  the test logic not production code.