Add a PackageManager Support badge to README.md (airbnb#1662)

README.md

@@ -1,5 +1,5 @@
 # Lottie for iOS
- [![Version](https://img.shields.io/cocoapods/v/lottie-ios.svg?style=flat)](https://cocoapods.org/pods/lottie-ios) [![License](https://img.shields.io/cocoapods/l/lottie-ios.svg?style=flat)](https://cocoapods.org/pods/lottie-ios) [![Platform](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fairbnb%2Flottie-ios%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/airbnb/lottie-ios) [![Swift Versions](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fairbnb%2Flottie-ios%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/airbnb/lottie-ios)
+ [![Version](https://img.shields.io/cocoapods/v/lottie-ios.svg?style=flat)](https://cocoapods.org/pods/lottie-ios) [![Carthage Compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) [![SwiftPM](https://img.shields.io/badge/SPM-supported-DE5C43.svg?style=flat)](https://swift.org/package-manager/) [![License](https://img.shields.io/cocoapods/l/lottie-ios.svg?style=flat)](https://cocoapods.org/pods/lottie-ios) [![Platform](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fairbnb%2Flottie-ios%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/airbnb/lottie-ios) [![Swift Versions](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fairbnb%2Flottie-ios%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/airbnb/lottie-ios)
 
 **View documentation, FAQ, help, examples, and more at [airbnb.io/lottie](http://airbnb.io/lottie/)**