[docs] Request shields.io badges over SSL [ci skip]

Author: vimishor

docs/index.md

@@ -8,9 +8,9 @@ title: Introduction
 
 [![Latest Version](https://img.shields.io/packagist/v/gentle/bitbucket-api.svg?style=flat-square)](https://packagist.org/packages/gentle/bitbucket-api)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://github.com/gentlero/bitbucket-api/blob/master/LICENSE)
-[![Build Status](http://img.shields.io/travis/gentlero/bitbucket-api/master.svg?style=flat-square)](https://travis-ci.org/gentlero/bitbucket-api)
+[![Build Status](https://img.shields.io/travis/gentlero/bitbucket-api/master.svg?style=flat-square)](https://travis-ci.org/gentlero/bitbucket-api)
 [![Coverage Status](https://img.shields.io/scrutinizer/coverage/b/gentlero/bitbucket-api.svg?style=flat-square)](https://scrutinizer-ci.com/b/gentlero/bitbucket-api/?branch=develop)
-[![Code quality](http://img.shields.io/scrutinizer/b/gentlero/bitbucket-api.svg?style=flat-square)](https://scrutinizer-ci.com/b/gentlero/bitbucket-api/?branch=develop)
+[![Code quality](https://img.shields.io/scrutinizer/b/gentlero/bitbucket-api.svg?style=flat-square)](https://scrutinizer-ci.com/b/gentlero/bitbucket-api/?branch=develop)
 
 ### What is this ?