Risqué

I've just come back to the project after another break, and had to spend a few hours bringing all the dependencies up to date. I've been working with Expo as a solution to support iOS/Android, and a lot has changed in the React space since my last visit.

Upgrading Expo was easy enough, but react-navigation has changed substantially and required a few hours of rewrite. The new API is nice, hope it doesn't change again any time soon. Also decided to rip out the Redux toolkit and instead use React context.