Max Woo

now that `mtimes` has been removed from watchpack, how do we get all changed/removed files?

7

## Feature request **What is the expected behavior?** It seems like the new version of WatchPack (v2.0.0) are getting rid of the [`mtimes`](https://github.com/webpack/watchpack/blob/v1.6.0/lib/watchpack.js#L21) variable. However, from my research it seems...