Updating README.md

Author: avoidwork

README.md

@@ -2,7 +2,7 @@
 
 [![downloads](https://img.shields.io/npm/dt/filesize.svg)](https://www.npmjs.com/package/filesize) [![CDNJS version](https://img.shields.io/cdnjs/v/filesize.svg)](https://cdnjs.com/libraries/filesize)
 
-filesize.js provides a simple way to get a human readable file size string from a number (float or integer) or string.
+filesize.js provides a simple way to get a human-readable file size string from a number (float or integer) or string.
 
 ```javascript
 import {filesize} from "filesize";