Add npm badge and code example

README.md

@@ -1,2 +1,18 @@
-# semver-intersect [![Build Status](https://travis-ci.org/snyamathi/semver-intersect.svg?branch=master)](https://travis-ci.org/snyamathi/semver-intersect)
+# semver-intersect [![Build Status](https://travis-ci.org/snyamathi/semver-intersect.svg?branch=master)](https://travis-ci.org/snyamathi/semver-intersect) [![npm](https://img.shields.io/npm/v/semver-intersect.svg)](https://www.npmjs.com/package/semver-intersect)
 Get the intersection of multiple semver ranges
+
+```js
+const { intersect } = require('semver-intersect');
+
+// ^4.1.0
+intersect('^4.0.0', '^4.1.0');                        
+
+// ~4.3.0
+intersect('^4.0.0', '~4.3.0');                        
+
+// ~4.3.89
+intersect('^4.0.0', '~4.3.89', '~4.3.24', '~4.3.63'); 
+
+// throws "Range >=4.5.0 is not compatible with <4.4.0"
+intersect('^4.0.0', '~4.3.0', '^4.5.0')
+```