Update readme

Author: heoblitz

README.md

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 # URLPattern
 [![Swift](https://github.com/heoblitz/URLPattern/actions/workflows/swift.yml/badge.svg?branch=main)](https://github.com/heoblitz/URLPattern/actions/workflows/swift.yml)
+[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fheoblitz%2FURLPattern%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/heoblitz/URLPattern)
+[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fheoblitz%2FURLPattern%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/heoblitz/URLPattern)
 
 A Swift Macro that helps mapping URLs to Enum cases.