Crash during animation on dismissed VC

* [ x] I've read, understood, and done my best to follow the [*CONTRIBUTING guidelines](https://github.com/jjatie/Charts/blob/master/CONTRIBUTING.md).

## What did you do?

I am running a series of two delayed animations when a view controller appears.
` override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(100)) { [ weak self] in
self?.graphView?.moveViewToAnimated(xValue: 20000, yValue: 0, axis: .left, duration: 0.5, easingOption: .easeOutQuad)
DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(750)) {
self?.graphView?.moveViewToAnimated(xValue: 0, yValue: 0, axis: .left, duration: 0.5, easingOption: .easeInOutQuad)
}
}
}`
If the view controller is dismissed mid animation, the app crashes

## What did you expect to happen?

I would expect the app not to crash

## What happened instead?

The app crashed
`open class AnimatedMoveViewJob: AnimatedViewPortJob
{
internal override func animationUpdate()
{
var pt = CGPoint(
x: xOrigin + (CGFloat(xValue) - xOrigin) * phase,
y: yOrigin + (CGFloat(yValue) - yOrigin) * phase
)

transformer.pointValueToPixel(&pt)
viewPortHandler.centerViewPort(pt: pt, chart: view)
}
}`
it crashed on the line `transformer.pointValueToPixel(&pt)`

## Charts Environment

**Charts version/Branch/Commit Number:** 4.1.0
**Xcode version:**14.0.1
**Swift version:**5
**Platform(s) running Charts:**iOS
**macOS version running Xcode:**12.6

## Demo Project