Add LICENSE badge and section

README.md

@@ -1,7 +1,8 @@
-[![Go Report Card](https://goreportcard.com/badge/github.com/veritrans/go-midtrans)](https://goreportcard.com/report/github.com/veritrans/go-midtrans)
-
 # Midtrans Library for Go(lang)
 
+[![Go Report Card](https://goreportcard.com/badge/github.com/veritrans/go-midtrans)](https://goreportcard.com/report/github.com/veritrans/go-midtrans)
+[![Apache 2.0 license](http://img.shields.io/badge/license-Apache 2.0-brightgreen.svg)](LICENSE)
+
 Midtrans :heart: Go !
 
 Go is a very modern, terse, and combine aspect of dynamic and static typing that in a way very
@@ -86,3 +87,7 @@ snap.pay(token, {
 You may want to override those `onSuccess`, `onPending` and `onError`
 functions to reflect the behaviour that you wished when the charging
 result in their respective state.
+
+## License
+
+See [LICENSE](LICENSE).