Update contributors

basiliscos · basiliscos · commit effc21780d3b · 2018-10-21T12:14:19.000+03:00
diff --git a/README.md b/README.md
@@ -660,6 +660,9 @@ MIT
 
 # Contributors
 
+- [Derek Colley](https://github.com/dcolley)
+- [Stefan Hacker](https://github.com/hacst)
+- [Yuval Hager](https://github.com/yhager)
 - [Vinnie Falco](https://github.com/vinniefalco)
 
 ## See also
