Add new contributors to authors list

Author: firstred

docs/authors.rst

@@ -31,5 +31,9 @@ These contributors have helped with making this library possible. Thank you so m
 * `Joshua Bours <https://github.com/jbours>`_ (contributor)
 * `Hidde Schuurman <https://github.com/ISMHiddeSchuurman>`_ (contributor)
 * `Gijs <https://github.com/gsdkkr>`_ (contributor)
+* `mtkweb <https://github.com/mtkweb>`_ (contributor)
+* `SanderHagen <https://github.com/SanderHagen>`_ (contributor)
+* `Jurjen12 <https://github.com/Jurjen12>`_ (contributor)
+* `annuh <https://github.com/annuh>`_ (contributor)
 * Mathieu Haverkamp (contributor)
 * Jeroen Smit (contributor)