update AUTHORS for 2020.1

Author: pdebuyl

AUTHORS.rst

@@ -53,6 +53,8 @@ Listed by alphabetical order
 
 - arunpersaud
 
+- Sebastian Berg
+
 - Lilian Besson
 
 - Matthieu Boileau
@@ -77,6 +79,8 @@ Listed by alphabetical order
 
 - David Cournapeau
 
+- Dave
+
 - dogacan dugmeci
 
 - Török Edwin
@@ -119,10 +123,14 @@ Listed by alphabetical order
 
 - Jonathan Helmus
 
+- Andreas Hilboll
+
 - Himanshu
 
 - Julian Hofer
 
+- Tim Hoffmann
+
 - Tarek Hoteit
 
 - Gert-Ludwig Ingold
@@ -193,8 +201,12 @@ Listed by alphabetical order
 
 - Rutzmoser
 
+- Sander
+
 - João Felipe Santos
 
+- Mark Setchell
+
 - Helen Sherwood-Taylor
 
 - Shoeboxam