Missing features

Nobody has claimed this yet.

## New Feature
I am having trouble understanding Mapbox v10. The way I'm using it now it seems to be missing many functions like the regionDidChangeAnimated for example that was a part of the MGLMapViewDelegate prior to v10.
The way I'm interacting with the map now is through `mapView.mapboxMap.onEvery()` but the map event options here don't include equivalents to many of the old delegated functions.

View annotations is also a thing, I can not filter out annotations as before like bellow
```
map.annotations?.filter {...}
```

Thank you all in advance for any help you can provide.

Start with the Mapbox v10 map event options exposed through mapView.mapboxMap.onEvery() and compare them with the previous MGLMapViewDelegate callbacks, especially regionDidChangeAnimated. Also investigate the current view-annotation APIs and the requested annotation filtering behavior. The issue needs a defined set of missing equivalents before completion can be measured.

Written by the indexing model from the issue text.