Add the Package.swift for SwiftPM support, update Catalyst support

Author: dreampiggy

.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,33 @@
+// swift-tools-version:5.1
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "SDWebImageLinkPlugin",
+    platforms: [
+       .macOS(.v10_15), .iOS(.v13)
+    ],
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "SDWebImageLinkPlugin",
+            targets: ["SDWebImageLinkPlugin"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+        .package(url: "https://github.com/SDWebImage/SDWebImage.git", from: "5.1.0")
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "SDWebImageLinkPlugin",
+            dependencies: ["SDWebImage"],
+            path: ".",
+            sources: ["SDWebImageLinkPlugin/Classes"],
+            publicHeadersPath: "SDWebImageLinkPlugin/Classes"
+        )
+    ]
+)

Package.resolved

@@ -31,5 +31,10 @@ TODO: Add long description of the pod here.
 
   s.source_files = 'SDWebImageLinkPlugin/Classes/**/*', 'SDWebImageLinkPlugin/Module/SDWebImageLinkPlugin.h'
 
+  s.pod_target_xcconfig = {
+    'SUPPORTS_MACCATALYST' => 'YES',
+    'DERIVE_MACCATALYST_PRODUCT_BUNDLE_IDENTIFIER' => 'NO'
+  }
+  
   s.dependency 'SDWebImage', '~> 5.0'
 end