fix-fix

Stats are not being updated for days

3

Currently the main page says that "This page was generated 128 hours 15 minutes ago" and all **Day** and **Week** stats are 0.

In [**Monad Transformer Stacks** section](https://github.com/paf31/purescript-book/blob/cf0b510052495e884059667e0585156cf68e354b/text/chapter11.md#monad-transformer-stacks) in chapter 11 REPL example uses `runIdentity` from `purescript-identity` package. But this function was removed in [v2.0 release](https://github.com/purescript/purescript-identity/pull/9) and it's advised to use more generic...