Merge branch 'feature/update-contributers' into 'master'

[contributors] Add Kilian for 2018

See merge request !1461

LICENSE.md

@@ -59,7 +59,7 @@ Copyright holders
 | 2018       | Martin Utz                 |
 | 2010-2014  | Lena Walter                |
 | 2018       | Felix Weinhardt            |
-| 2015-2017  | Kilian Weishaupt           |
+| 2015-2018  | Kilian Weishaupt           |
 | 2010-2011  | David Werner               |
 | 2015       | Hao Wu                     |
 | 2008-2013  | Markus Wolff               |