Add Dependency Status Badge [ci skip]

Author: Rails SQL Server

README.md

@@ -5,6 +5,7 @@
 * [![CircleCI](https://circleci.com/gh/rails-sqlserver/activerecord-sqlserver-adapter/tree/master.svg?style=svg)](https://circleci.com/gh/rails-sqlserver/activerecord-sqlserver-adapter/tree/master) - CircleCI
 * [![Build Status](https://ci.appveyor.com/api/projects/status/mtgbx8f57vr7k2qa/branch/master?svg=true)](https://ci.appveyor.com/project/rails-sqlserver/activerecord-sqlserver-adapter/branch/master) - Appveyor
 * [![Gem Version](http://img.shields.io/gem/v/activerecord-sqlserver-adapter.svg)](https://rubygems.org/gems/activerecord-sqlserver-adapter) - Gem Version
+* [![Dependency Status](https://dependencyci.com/github/rails-sqlserver/activerecord-sqlserver-adapter/badge)](https://dependencyci.com/github/rails-sqlserver/activerecord-sqlserver-adapter) - Dependency Status
 * [![Gitter chat](https://img.shields.io/badge/%E2%8A%AA%20GITTER%20-JOIN%20CHAT%20%E2%86%92-brightgreen.svg?style=flat)](https://gitter.im/rails-sqlserver/activerecord-sqlserver-adapter) - Community