docs: add depencies status badge to README

README.md

@@ -2,6 +2,7 @@
 [![CircleCI](https://circleci.com/gh/davidballester/grapher/tree/master.svg?style=svg)](https://circleci.com/gh/davidballester/grapher/tree/master)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![Netlify Status](https://api.netlify.com/api/v1/badges/e682ebfd-e62e-4a58-a194-edac472f7f12/deploy-status)](https://app.netlify.com/sites/wizardly-minsky-4657d5/deploys)
+[![Dependencies](https://david-dm.org/davidballester/grapher.svg)](https://david-dm.org/davidballester/grapher.svg)
 
 # [Grapher](https://wizardly-minsky-4657d5.netlify.com/)