Update the main AUTHORS file

AUTHORS

diff --git a/AUTHORS b/AUTHORS
index 60355f3..ebe7c74 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -32,6 +32,7 @@
  * Samuel Williams
  * Simon-Pierre Cadieux
  * Tim Wegner
+ * Tobias Stoeckmann
  * Tom Lane
  * Tom Tanner
  * Vadim Barkov