Fix regression in GHA by building for iOS simulator instead

Don't even start projecting, if task in chunk is cancelled

Async projection (#32)

* Offload projection to a detached task to not block main actor

* Attempt to improve this

* Refactor into `projectInParallel` helper

* Update packages

Improve performance by projecting contents just once and caching result

Robustness, check for invalid points; ignore `zoomTo` rects of size z…

…ero.

Style tweaks (#29)

* Remove hard-coded zoom out factor in UIKit

* Allow setting more default styling

* Also allow specifying a point alpha

Adds `GeoDrawer.ProjectionMode` helper, including `.automatic` mode (#28

)

Allow setting custom stroke width (#24)

GeoDrawer.Content can be hashable (#22)

Tweaks (#20)

* Make a few more things public

* SPM update, align platform requirement with GeoJSONKit-Turf, VisionOS support

* Also test Swift 5.9.1

And update to latest checkout action