Update README.md

Author: s4cha

README.md

@@ -4,6 +4,7 @@
 
 [![Language: Swift 5](https://img.shields.io/badge/language-swift5-f48041.svg?style=flat)](https://developer.apple.com/swift)
 ![Platform: iOS 8+](https://img.shields.io/badge/platform-iOS%208%2B-blue.svg?style=flat)
+[![SPM compatible](https://img.shields.io/badge/SPM-compatible-4BC51D.svg?style=flat)](https://swift.org/package-manager)
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 [![Cocoapods compatible](https://img.shields.io/badge/Cocoapods-compatible-4BC51D.svg?style=flat)](https://cocoapods.org)
 [![Build Status](https://app.bitrise.io/app/ffd8fe5df34624ff/status.svg?token=IahWn-RB5hTWzvBbcIktsQ&branch=master)](https://app.bitrise.io/app/ffd8fe5df34624ff)