Updates for Swift 5 compatibility

Author: poetmountain

Sources/MotionGroup.swift

@@ -555,7 +555,7 @@ public class MotionGroup: Moveable, MoveableCollection, TempoDriven, MotionUpdat
     public func remove(_ motion: Moveable) {
 
         // first grab the index of the object in the motions array so we can remove the corresponding tempoOverrides value
-        let index = motions.index {
+        let index = motions.firstIndex {
             $0 == motion
         }
         if let motion_index = index {

Sources/MotionMachine.swift

@@ -335,7 +335,7 @@ public protocol ValueAssistant {
 
 public extension ValueAssistant {
 
-    public func retrieveCurrentObjectValue(forProperty property: PropertyData) -> Double? {
+    func retrieveCurrentObjectValue(forProperty property: PropertyData) -> Double? {
 
         guard let unwrapped_object = property.targetObject else { return nil }
 
@@ -355,7 +355,7 @@ public extension ValueAssistant {
 // utility methods for ValueAssistant
 public extension ValueAssistant {
 
-    public func applyTo(value: inout Double, newValue: Double) {
+    func applyTo(value: inout Double, newValue: Double) {
         if (additive) {
             value += (newValue * additiveWeighting)
         } else {
@@ -364,15 +364,15 @@ public extension ValueAssistant {
 
     }
 
-    public func applyTo(value: inout CGFloat, newValue: CGFloat) {
+    func applyTo(value: inout CGFloat, newValue: CGFloat) {
         if (additive) {
             value += (newValue * CGFloat(additiveWeighting))
         } else {
             value = newValue
         }
     }
 
-    public func lastComponent(forPath path: String) -> String {
+    func lastComponent(forPath path: String) -> String {
         let components = path.components(separatedBy: ".")
         return components.last!
     }

Sources/MotionSequence.swift

@@ -574,7 +574,7 @@ public class MotionSequence: Moveable, MoveableCollection, TempoDriven, MotionUp
     public func remove(_ sequenceStep: Moveable) {
 
         // first grab the index of the object in the motions array so we can remove the corresponding tempoOverrides value
-        let index = steps.index {
+        let index = steps.firstIndex {
             $0 == sequenceStep
         }