add swift package manager support

Author: lewandowskit93

.gitignore

@@ -42,4 +42,7 @@ xcuserdata/
 /*.gcno
 
 ## Test output
-test_output
+test_output
+
+#$ Swift Package Manager
+.build/

Package.swift

@@ -0,0 +1,32 @@
+// swift-tools-version:5.1
+//
+//  Package.swift
+//  Visually
+//
+//  Created by Tomasz Lewandowski on 22/01/2020.
+//
+import PackageDescription
+
+let package = Package(
+    name: "Visually",
+    platforms: [
+        .macOS(.v10_11),
+        .iOS(.v8),
+        .tvOS(.v9)
+    ],
+    products: [
+        .library(
+            name: "Visually",
+            targets: ["Visually"])
+    ],
+    targets: [
+        .target(
+            name: "Visually",
+            dependencies: [],
+            path: "Visually"),
+        .testTarget(
+            name: "VisuallyTests",
+            dependencies: ["Visually"],
+            path: "VisuallyTests")
+    ]
+)