updated ci badges

Signed-off-by: Frederic BIDON <[email protected]>

Author: fredbi

README.md

@@ -1,5 +1,8 @@
-# Validation helpers [![Build Status](https://travis-ci.org/go-openapi/validate.svg?branch=master)](https://travis-ci.org/go-openapi/validate) [![codecov](https://codecov.io/gh/go-openapi/validate/branch/master/graph/badge.svg)](https://codecov.io/gh/go-openapi/validate) [![Slack Status](https://slackin.goswagger.io/badge.svg)](https://slackin.goswagger.io)
-
+# Validation helpers
+[![Build Status](https://travis-ci.org/go-openapi/validate.svg?branch=master)](https://travis-ci.org/go-openapi/validate)
+[![codecov](https://codecov.io/gh/go-openapi/validate/branch/master/graph/badge.svg)](https://codecov.io/gh/go-openapi/validate)
+[![Slack Status](https://slackin.goswagger.io/badge.svg)](https://slackin.goswagger.io)
+[![Build status](https://ci.appveyor.com/api/projects/status/d6epy6vipueyh5fs/branch/master?svg=true)](https://ci.appveyor.com/project/fredbi/validate/branch/master)
 [![license](http://img.shields.io/badge/license-Apache%20v2-orange.svg)](https://raw.githubusercontent.com/go-openapi/validate/master/LICENSE)
 [![GoDoc](https://godoc.org/github.com/go-openapi/validate?status.svg)](http://godoc.org/github.com/go-openapi/validate)
 [![Go Report Card](https://goreportcard.com/badge/github.com/go-openapi/validate)](https://goreportcard.com/report/github.com/go-openapi/validate)