add swift package manager compatibility

Package.swift

@@ -0,0 +1,43 @@
+// swift-tools-version:5.1
+//
+//  Package.swift
+//
+//  Copyright (c) Ramotion (https://www.ramotion.com/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import PackageDescription
+
+
+let package = Package(
+    name: "PaperOnboarding",
+    platforms: [
+        .iOS(.v10)
+    ],
+    products: [
+        .library(name: "PaperOnboarding",
+            targets: ["PaperOnboarding"]),
+    ],
+    targets: [
+        .target(name: "PaperOnboarding",
+            path: "Source")
+    ],
+    swiftLanguageVersions: [.v5]
+)

README.md

@@ -51,6 +51,14 @@ or [Carthage](https://github.com/Carthage/Carthage) users can simply add to thei
 github "Ramotion/paper-onboarding"
 ```
 
+or [Swift Package Manager](https://swift.org/package-manager/) by adding:
+```
+dependencies: [
+.package(url: "https://github.com/Ramotion/paper-onboarding.git", from: "6.1.4")
+]
+```
+to `Package.swift`
+
 ## Usage
 
 #### Storyboard