Fix "complementaryColor" color isn't changed after updating the application theme (#496)

Author: Dolphin54rus

SkeletonViewCore/Sources/Internal/Models/SkeletonLayer.swift

@@ -28,12 +28,12 @@ struct SkeletonLayer {
         self.maskLayer.bounds = holder.definedMaxBounds
         self.maskLayer.cornerRadius = CGFloat(holder.skeletonCornerRadius)
         addTextLinesIfNeeded()
-        self.maskLayer.tint(withColors: colors)
+        self.maskLayer.tint(withColors: colors, traitCollection: holder.traitCollection)
     }
 
     func update(usingColors colors: [UIColor]) {
         layoutIfNeeded()
-        maskLayer.tint(withColors: colors)
+        maskLayer.tint(withColors: colors, traitCollection: holder?.traitCollection)
     }
 
     func layoutIfNeeded() {

SkeletonViewCore/Sources/Internal/UIKitExtensions/CALayer+Extensions.swift

@@ -15,11 +15,15 @@ import UIKit
 
 extension CAGradientLayer {
 
-    override func tint(withColors colors: [UIColor]) {
+    override func tint(withColors colors: [UIColor], traitCollection: UITraitCollection?) {
         skeletonSublayers.recursiveSearch(leafBlock: {
-            self.colors = colors.map { $0.cgColor }
+            if #available(iOS 13.0, tvOS 13, *), let traitCollection = traitCollection {
+                self.colors = colors.map { $0.resolvedColor(with: traitCollection).cgColor }
+            } else {
+                self.colors = colors.map { $0.cgColor }
+            }
         }) {
-            $0.tint(withColors: colors)
+            $0.tint(withColors: colors, traitCollection: traitCollection)
         }
     }
 
@@ -35,11 +39,15 @@ extension CALayer {
         return sublayers?.filter { $0.name == Constants.skeletonSubLayersName } ?? [CALayer]()
     }
 
-    @objc func tint(withColors colors: [UIColor]) {
+    @objc func tint(withColors colors: [UIColor], traitCollection: UITraitCollection?) {
         skeletonSublayers.recursiveSearch(leafBlock: {
-            backgroundColor = colors.first?.cgColor
+            if #available(iOS 13.0, tvOS 13, *), let traitCollection = traitCollection {
+                backgroundColor = colors.first?.resolvedColor(with: traitCollection).cgColor
+            } else {
+                backgroundColor = colors.first?.cgColor
+            }
         }) {
-            $0.tint(withColors: colors)
+            $0.tint(withColors: colors, traitCollection: traitCollection)
         }
     }
 

SkeletonViewCore/Sources/Internal/UIKitExtensions/UIColor+Skeleton.swift

@@ -43,7 +43,13 @@ public extension UIColor {
     }
 
     var complementaryColor: UIColor {
-        isLight ? darker : lighter
+        if #available(iOS 13, tvOS 13, *) {
+            return UIColor { _ in
+                self.isLight ? self.darker : self.lighter
+            }
+        } else {
+            return isLight ? darker : lighter
+        }
     }
 
     var lighter: UIColor {