Change access modifiers in Animation (#44)

Source/Animation.swift

@@ -8,38 +8,38 @@
 
 import UIKit
 
-public class Animation<T: Interpolatable> where T.ValueType == T {
+open class Animation<T: Interpolatable> where T.ValueType == T {
     private let filmstrip = Filmstrip<T>()
-    
+
     public init() {}
-    
-    public subscript(time: CGFloat) -> T {
+
+    open subscript(time: CGFloat) -> T {
         get {
             return filmstrip[time]
         }
         set {
             addKeyframe(time, value: newValue)
         }
     }
-    
-    public func addKeyframe(_ time: CGFloat, value: T) {
+
+    open func addKeyframe(_ time: CGFloat, value: T) {
         if !checkValidity(value) {return}
         filmstrip[time] = value
     }
-    
-    public func addKeyframe(_ time: CGFloat, value: T, easing: @escaping EasingFunction) {
+
+    open func addKeyframe(_ time: CGFloat, value: T, easing: @escaping EasingFunction) {
         if !checkValidity(value) {return}
         filmstrip.setValue(value, atTime: time, easing: easing)
     }
-    
-    public func hasKeyframes() -> Bool {
+
+    open func hasKeyframes() -> Bool {
         return !filmstrip.isEmpty
     }
-    
-    public func validateValue(_ value: T) -> Bool {
+
+    open func validateValue(_ value: T) -> Bool {
         return true
     }
-    
+
     private func checkValidity(_ value: T) -> Bool {
         let valid = validateValue(value)
         assert(valid, "The keyframe value is invalid for this type of animation.")