Add SPI shields to README

Mark Pospesel · mpospese · commit 5a9b64b8d584 · 2023-02-27T16:51:55.000+01:00
diff --git a/README.md b/README.md
@@ -1,4 +1,5 @@
 ![Y—Calendar Picker](https://user-images.githubusercontent.com/1037520/220841655-8784e89b-1836-4fc5-8bc9-40c758b6d6f5.jpeg)
+[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fyml-org%2Fycalendarpicker-ios%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/yml-org/ycalendarpicker-ios) [![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fyml-org%2Fycalendarpicker-ios%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/yml-org/ycalendarpicker-ios)  
 _An easy-to-use and highly customizable month calendar._
 
 This frameworks provides a month calendar picker with both UIKit and SwiftUI variants.

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`![Y—Calendar Picker](https://user-images.githubusercontent.com/1037520/220841655-8784e89b-1836-4fc5-8bc9-40c758b6d6f5.jpeg)`
	`2`	`+[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fyml-org%2Fycalendarpicker-ios%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/yml-org/ycalendarpicker-ios) [![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fyml-org%2Fycalendarpicker-ios%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/yml-org/ycalendarpicker-ios)`
`2`	`3`	`_An easy-to-use and highly customizable month calendar._`
`3`	`4`
`4`	`5`	`This frameworks provides a month calendar picker with both UIKit and SwiftUI variants.`