* Refactor FloatingPanel.targetPosition()
* Add test_targetPosition tests
* Fix bottomY
* Call shouldProjectMomentum(_:for:) only when a projection occurs on next
or pre segment. It means the delegate method not called for redirection.
* Improve all projection
* Add sample code
* Fix updateInteractiveTopConstraint()
* {min,max}Y variables are confusing because it's not a value of coordinate Y,
but a constant value from the `interactiveTopConstraint`.
The default Swift version leaves 4.0. Because it avoids build errors
with Carthage on each Xcode version from the source compatibility
between Swift 4.0, 4.2 and 5.0.
With regard to CocoaPods, the pod spec is going to support
`swift_versions` introduced in CocoaPods v1.7.0. For now, a user needs
to override `SWIFT_VERSION` appropriately in Podfile.
Because an interruptible animator causes a wobbling at the animation start.
when a user flick a panel quickly to move to full position nearby the position.
Shin Yamamoto
Federico Zanetello
Ortwin Gentz