bump contributor badge

README.md

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 # Hack
 
-[![Build Status](https://travis-ci.org/source-foundry/Hack.svg?branch=master)](https://travis-ci.org/source-foundry/Hack) [![Contributors](https://img.shields.io/badge/contributors-124-orange.svg?style=flat)](https://github.com/source-foundry/Hack/blob/master/docs/CONTRIBUTORS.md)
+[![Build Status](https://travis-ci.org/source-foundry/Hack.svg?branch=master)](https://travis-ci.org/source-foundry/Hack) [![Contributors](https://img.shields.io/badge/contributors-125-orange.svg?style=flat)](https://github.com/source-foundry/Hack/blob/master/docs/CONTRIBUTORS.md)
 
 Hack v3 is here!  [Click here to learn what's new](https://medium.com/source-words/hack-typeface-v3-6943991c1a80).