docs(readme): add Greenkeeper badge

greenkeeper[bot] · greenkeeper[bot] · commit c8099950524a · 2018-10-02T21:03:51.000Z
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-# Query-Stringifier [![Build Status](https://travis-ci.org/joshghent/query-stringifier.svg?branch=master)](https://travis-ci.org/joshghent/query-stringifier) [![npm version](https://badge.fury.io/js/query-stringifier.svg)](https://badge.fury.io/js/query-stringifier) ![devDependencies](https://david-dm.org/joshghent/query-stringifier.svg)
+# Query-Stringifier [![Build Status](https://travis-ci.org/joshghent/query-stringifier.svg?branch=master)](https://travis-ci.org/joshghent/query-stringifier) [![npm version](https://badge.fury.io/js/query-stringifier.svg)](https://badge.fury.io/js/query-stringifier) [![Greenkeeper badge](https://badges.greenkeeper.io/joshghent/query-stringifier.svg)](https://greenkeeper.io/) ![devDependencies](https://david-dm.org/joshghent/query-stringifier.svg)
 A small library for build query strings
 
 ## Install

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`1`		`-# Query-Stringifier [![Build Status](https://travis-ci.org/joshghent/query-stringifier.svg?branch=master)](https://travis-ci.org/joshghent/query-stringifier) [![npm version](https://badge.fury.io/js/query-stringifier.svg)](https://badge.fury.io/js/query-stringifier) ![devDependencies](https://david-dm.org/joshghent/query-stringifier.svg)`
	`1`	`+# Query-Stringifier [![Build Status](https://travis-ci.org/joshghent/query-stringifier.svg?branch=master)](https://travis-ci.org/joshghent/query-stringifier) [![npm version](https://badge.fury.io/js/query-stringifier.svg)](https://badge.fury.io/js/query-stringifier) [![Greenkeeper badge](https://badges.greenkeeper.io/joshghent/query-stringifier.svg)](https://greenkeeper.io/) ![devDependencies](https://david-dm.org/joshghent/query-stringifier.svg)`
`2`	`2`	`A small library for build query strings`
`3`	`3`
`4`	`4`	`## Install`