Enhancement

@reach/dialog internally relies on a react-focus-lock dependency library, which was recently updated to a new version 2.5.1.
There was an existing performance issue with this library and it's dependency focus-lock in the previous version.

They've found it, improved on it and it has upgraded overall performance of the focus lock feature. Just wanted to point that out and try to get this dependency bumped, rather sooner than later, thank you.