com.unity.splines 1.0.0-pre.8 Package Notes

[1384451] Fixing knot handles size being too large.
[1386704] Fixing SplineData Inspector not being displayed.
Fixing wrong Spline length when editing spline using the inspector.
[1384455] Fix single element selections breaking the undo stack.
[1384448] Fix for CTRL/CMD + Drag not performing a multi selection.
[1384457] Fix for an exception being sometimes thrown when drawing a spline and rotating the scene view.
[1384520] Fixing stack overflow when entering playmode.
Fixing SplineData conversion being wrong with KnotIndex.

Added a `SplineExtrude` component and an accompanying ExtrudeSpline sample scene.
When using a spline transform tool, CTRL/CMD + A now selects all spline elements.
Improving Spline Inspector overlay.
`SplineUtility.CalculateLength` now accepts `T : ISpline` instead of `Spline`.

com.unity.splines 1.0.0-pre.8