Update README.md

Author: jf-tech

README.md

@@ -1,6 +1,9 @@
 # go-corelib
 
-![CI](https://github.com/jf-tech/go-corelib/workflows/CI/badge.svg) [![codecov](https://codecov.io/gh/jf-tech/go-corelib/branch/master/graph/badge.svg)](https://codecov.io/gh/jf-tech/go-corelib) [![Go Report Card](https://goreportcard.com/badge/github.com/jf-tech/go-corelib)](https://goreportcard.com/report/github.com/jf-tech/go-corelib)
+![CI](https://github.com/jf-tech/go-corelib/workflows/CI/badge.svg)
+[![codecov](https://codecov.io/gh/jf-tech/go-corelib/branch/master/graph/badge.svg)](https://codecov.io/gh/jf-tech/go-corelib)
+[![Go Report Card](https://goreportcard.com/badge/github.com/jf-tech/go-corelib)](https://goreportcard.com/report/github.com/jf-tech/go-corelib)
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/jf-tech/go-corelib)](https://pkg.go.dev/github.com/jf-tech/go-corelib)
 
 A Library of Core Data Structures, Algorithms and Functions in Golang