add contributor

Author: oliviargg

AUTHORS.rst

@@ -5,3 +5,4 @@ Authors
 * André Böni - https://github.com/anboen
 * Pietro Sandrini - https://github.com/pietro-sandrini
 * Adrien Sizaret - https://github.com/adriensizaret
+* Olivia Ruggaber - https://github.com/oliviargg