Add cla-bot to the github4s in the wild section

Author: BenFradet

README.md

@@ -44,6 +44,7 @@ If you wish to add your library here please consider a PR to include it in the l
 --- | --- | ---
 ![scala-exercises](https://www.scala-exercises.org/assets/images/navbar_brand.svg) | [**scala-exercises**](https://www.scala-exercises.org/) | Scala Exercises is an Open Source project for learning different technologies based in the Scala Programming Language.
 | | [**dashing**](https://github.com/benfradet/dashing) | Dashing is a collection of dashboards to monitor the health of an open source organization.
+| | [**cla-bot**](https://github.com/snowplow-incubator/cla-bot) | Bot making sure external contributors sign a CLA.
 
 [comment]: # (Start Copyright)
 # Copyright
@@ -52,4 +53,4 @@ Github4s is designed and developed by 47 Degrees
 
 Copyright (C) 2016-2018 47 Degrees. <http://47deg.com>
 
-[comment]: # (End Copyright)
+[comment]: # (End Copyright)