iOS support

We currently support every major OS, except iOS.

Apple has historically taken a *very* cautious stance with ScreenTime data they collect, so support for iOS has been practically impossible (although RescueTime and some others offer an iOS app, it's really mostly a companion app).

However, a couple weeks ago someone gave me notice of Apple finally creating a more comprehensive API: https://www.reddit.com/r/QuantifiedSelf/comments/v1jykz/granular_app_tracking_on_iosipados/ibwbu2p/

The actual API: https://developer.apple.com/documentation/deviceactivity/deviceactivitydata

So, looks like this will be possible going forward. I don't personally own an iOS device, nor do I know anything about iOS dev, but going off how we built aw-android, we can probably do something similar for iOS, eventually.