Update minimum Swift version to 5.5 (#1787)

.github/workflows/main.yml

@@ -9,16 +9,14 @@ on:
 jobs:
   build-package:
     name: "Build Package"
-    # The macos-11 image includes Xcode 12 releases, but the macos-12
-    # image only includes Xcode 13 releases. We still need to use macos-11
-    # on this job to build using Swift 5.3 and Swift 5.4.
-    runs-on: macos-11
+    runs-on: macos-12
     strategy:
+      fail-fast: false
       matrix:
         xcode:
-        - '12.4' # Swift 5.3
-        - '12.5.1' # Swift 5.4
-        - '13.2' # Swift 5.5
+        - '13.2.1' # Swift 5.5
+        - '13.4.1' # Swift 5.6
+        - '14.0.1' # Swift 5.7
     steps:
       - uses: actions/checkout@v2
       - uses: ./.github/actions/setup

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.3
+// swift-tools-version:5.5
 import PackageDescription
 
 let package = Package(

Sources/Private/CoreAnimation/Animations/CALayer+addAnimation.swift

@@ -233,8 +233,8 @@ extension CALayer {
       NSNumber(value: Float(context.progressTime(for: keyframeModel.time)))
     }
 
-    var timingFunctions = self.timingFunctions(for: keyframes)
-    let calculationMode = self.calculationMode(for: keyframes)
+    var timingFunctions = timingFunctions(for: keyframes)
+    let calculationMode = calculationMode(for: keyframes)
 
     let animation = CAKeyframeAnimation(keyPath: property.caLayerKeypath)
 

Sources/Private/Utility/Debugging/LayerDebugging.swift

@@ -75,7 +75,7 @@ extension CALayer {
 
   @nonobjc
   func setDebuggingState(visible: Bool) {
-    var sublayers = self.sublayers
+    var sublayers = sublayers
     if let cust = self as? CustomLayerDebugging {
       sublayers = cust.layerForDebugging().sublayers
     }

Sources/Private/Utility/Extensions/AnimationKeypathExtension.swift

@@ -225,8 +225,8 @@ extension String {
     }
     if let index = firstIndex(of: "*") {
       // Wildcard search.
-      let prefix = String(self.prefix(upTo: index))
-      let suffix = String(self.suffix(from: self.index(after: index)))
+      let prefix = String(prefix(upTo: index))
+      let suffix = String(suffix(from: self.index(after: index)))
 
       if prefix.count > 0 {
         // Match prefix.

Sources/Public/Animation/LottieAnimationView.swift

@@ -1121,8 +1121,8 @@ final public class LottieAnimationView: LottieAnimationViewBase {
 
           """)
 
-    let animationContext = self.animationContext
-    let currentFrame = self.currentFrame
+    let animationContext = animationContext
+    let currentFrame = currentFrame
 
     makeAnimationLayer(usingEngine: .mainThread)
 

lottie-ios.podspec

@@ -22,7 +22,7 @@ Lottie enables designers to create and ship beautiful animations without an engi
   s.author           = { 'Brandon Withrow' => '[email protected]', 'Cal Stephens' => '[email protected]' }
   s.source           = { :git => 'https://github.com/airbnb/lottie-ios.git', :tag => s.version.to_s }
 
-  s.swift_version = '5.3'
+  s.swift_version = '5.5'
   s.ios.deployment_target = '11.0'
   s.osx.deployment_target = '10.10'
   s.tvos.deployment_target = '11.0'