Update readme with swift package index badges (#17)

README.md

@@ -1,9 +1,8 @@
 # Nimble-SnapshotTesting
 
 [![CI](https://github.com/tahirmt/Nimble-SnapshotTesting/actions/workflows/ci.yml/badge.svg)](https://github.com/tahirmt/Nimble-SnapshotTesting/actions/workflows/ci.yml)
-[![Version](https://img.shields.io/cocoapods/v/Nimble-SnapshotTesting.svg?style=flat)](https://cocoapods.org/pods/Nimble-SnapshotTesting)
-[![License](https://img.shields.io/cocoapods/l/Nimble-SnapshotTesting.svg?style=flat)](https://cocoapods.org/pods/Nimble-SnapshotTesting)
-[![Platform](https://img.shields.io/cocoapods/p/Nimble-SnapshotTesting.svg?style=flat)](https://cocoapods.org/pods/Nimble-SnapshotTesting)
+[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ftahirmt%2FNimble-SnapshotTesting%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/tahirmt/Nimble-SnapshotTesting)
+[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ftahirmt%2FNimble-SnapshotTesting%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/tahirmt/Nimble-SnapshotTesting)
 
 A Nimble matcher for https://github.com/pointfreeco/swift-snapshot-testing inspired from the work in https://github.com/ashfurrow/Nimble-Snapshots and https://github.com/Killectro/swift-snapshot-testing-nimble