added @DerAndereJohannes as a contributor

AUTHORS.rst

@@ -52,6 +52,7 @@ Contributors
 * `Jannik Gut <https://github.com/rostro36>`_
 * `Nattapong Thammasan <https://github.com/Nattapong-OnePlanet>`_ *(OnePlanet, Netherlands)*
 * `Marek Sokol <https://github.com/sokolmarek>`_ *(Faculty of Biomedical Engineering of the CTU in Prague, Czech Republic)*
+* `Johannes Herforth <https://github.com/DerAndereJohannes>`_ *(University of Luxembourg, Luxembourg)*
 
 
 Thanks also to `Chuan-Peng Hu <https://github.com/hcp4715>`_, `@ucohen <https://github.com/ucohen>`_, `Anthony Gatti <https://github.com/gattia>`_, `Julien Lamour <https://github.com/lamourj>`_, `@renatosc <https://github.com/renatosc>`_, `Nicolas Beaudoin-Gagnon <https://github.com/Fegalf>`_ and `@rubinovitz <https://github.com/rubinovitz>`_ for their contribution in `NeuroKit 1 <https://github.com/neuropsychology/NeuroKit.py>`_.