Add Matthew Rathbone to AUTHORS

Author: nene

AUTHORS

@@ -39,6 +39,7 @@ Karl Horky <karl.horky@gmail.com>
 Martin Nowak <code@dawg.eu>
 Matheus Salmi <mathsalmi@gmail.com>
 Matheus Teixeira <matheus.mtxr@gmail.com>
+Matthew Rathbone <matthew.rathbone@gmail.com>
 Matt Basta <matt@runwayml.com>
 Max R
 Michael Giannakopoulos <mgiannakopoulos@singlestore.com>