Update README

Author: lestrrat

README.md

@@ -2,9 +2,7 @@
 
 Fast strftime for Go
 
-[![Build Status](https://travis-ci.org/lestrrat-go/strftime.png?branch=master)](https://travis-ci.org/lestrrat-go/strftime)
-
-[![GoDoc](https://godoc.org/github.com/lestrrat-go/strftime?status.svg)](https://godoc.org/github.com/lestrrat-go/strftime)
+ ![](https://github.com/lestrrat-go/strftime/workflows/CI/badge.svg?branch=master) [![Go Reference](https://pkg.go.dev/badge/github.com/lestrrat-go/strftime.svg)](https://pkg.go.dev/github.com/lestrrat-go/strftime)
 
 # SYNOPSIS