Added CONTRIBUTORS file

CONTRIBUTORS.md

+# Contributors
+
+### Lead developers
+
+- Daniel Vedder
+
+- Lea Kolb
+
+
+### Code reviewers
+
+- Ludmilla Figueiredo
+
+
+### Advisors
+
+- Aletta Bonn
+
+- Kerstin Wiegand
+
+- Birgit Müller
+
+
+### Supervisor
+
+- Guy Pe'er

README.md

@@ -75,4 +75,4 @@ You can then access all Persephone functions, such as `simulate()`. (See
 
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-© 2022-2023 Daniel Vedder, Lea Kolb (MIT license)
+© 2022-2023 the contributors (MIT license)