Add codecov badge

README.md

@@ -1,9 +1,10 @@
 # qs #
-![Build](https://github.com/sonh/qs/workflows/build/badge.svg?branch=main)
-[![Release](https://img.shields.io/github/release/sonh/qs.svg)](https://github.com/sonh/qs/releases/)
+![build](https://github.com/sonh/qs/workflows/build/badge.svg?branch=main)
+[![codecov](https://codecov.io/gh/sonh/qs/branch/main/graph/badge.svg)](https://codecov.io/gh/sonh/qs)
+[![release](https://img.shields.io/github/release/sonh/qs.svg)](https://github.com/sonh/qs/releases/)
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/sonh/qs)](https://pkg.go.dev/github.com/sonh/qs)
-[![Go Report Card](https://goreportcard.com/badge/github.com/sonh/qs)](https://goreportcard.com/report/github.com/sonh/qs)
-[![Go version of a Go module](https://img.shields.io/github/go-mod/go-version/sonh/qs.svg)](https://github.com/sonh/qs)
+[![GoReportCard](https://goreportcard.com/badge/github.com/sonh/qs)](https://goreportcard.com/report/github.com/sonh/qs)
+[![GoVersionOfGoMod](https://img.shields.io/github/go-mod/go-version/sonh/qs.svg)](https://github.com/sonh/qs)
 
 Package sonh/qs encodes structs into url.Values.
 

doc.go

@@ -142,6 +142,5 @@ Limitation
 	- `interface`, `[]interface`, `map` are not supported yet
 	- `struct`, `slice`/`array` multi-level nesting are limited
 	- no decoder yet
-_Will improve in future versions_
 */
 package qs