spm support added

Package.swift

@@ -0,0 +1,24 @@
+// swift-tools-version:5.3
+
+import PackageDescription
+
+let package = Package(
+    name: "TCSSSLPinning",
+    defaultLocalization: "ru",
+    platforms: [.iOS(.v12)],
+    products: [
+        .library(
+            name: "TCSSSLPinning",
+            targets: ["TCSSSLPinning"]
+        ),
+    ],
+    dependencies: [
+        .package(url: "https://github.com/datatheorem/TrustKit.git", .exact("1.6.4"))
+    ],
+    targets: [
+        .binaryTarget(
+            name: "TCSSSLPinning",
+            path: "TCSSSLPinning.xcframework"
+        )
+    ]
+)