Switch to tagged release of stackotter/swift-png until debug mode optimizations get merged, and make Image Equatable

Author: stackotter

.gitignore

@@ -6,3 +6,4 @@ DerivedData/
 .swiftpm/configuration/registries.json
 .swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
 .netrc
+*.trace

Package.resolved

@@ -12,7 +12,7 @@ let package = Package(
         )
     ],
     dependencies: [
-        .package(url: "https://github.com/stackotter/swift-png", from: "4.4.4"),
+        .package(url: "https://github.com/stackotter/swift-png", from: "4.4.7"),
         .package(url: "https://github.com/stackotter/jpeg", from: "1.0.2"),
         .package(url: "https://github.com/stackotter/swift-libwebp", from: "0.1.0"),
     ],
@@ -30,5 +30,9 @@ let package = Package(
             dependencies: ["ImageFormats"],
             resources: [.copy("test.png"), .copy("test.jpg"), .copy("test.webp")]
         ),
+        .executableTarget(
+            name: "Benchmarks",
+            dependencies: ["ImageFormats"]
+        ),
     ]
 )

Package.swift

@@ -8,7 +8,7 @@ public enum ImageLoadingError: Error {
     case unknownImageFileExtension(String)
 }
 
-public struct Image<Pixel: BytesConvertible> {
+public struct Image<Pixel: BytesConvertible>: Equatable {
     public var width: Int
     public var height: Int
     public var data: [UInt8]