Fix
* Address data leakage issue for defense rankings ([`22fedf7`](https://github.com/thecodeforest/fantasyfootball/commit/22fedf718272f953d9897093e1f6d1313cd8c0d2))
* Address moving average issue ([`1f3a2e9`](https://github.com/thecodeforest/fantasyfootball/commit/1f3a2e94481fc4ff5bbafabd05edb537429a3471))