[gimp] authors.xml: add Niels De Graef

[Michael Natterer <mitch src gnome org>]

commit 9969dd8b038b1e2a6afac23e1382df0e0d70d733
Author: Michael Natterer <mitch gimp org>
Date:   Mon Aug 5 10:51:47 2019 +0200

    authors.xml: add Niels De Graef

 AUTHORS     | 1 +
 authors.xml | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/AUTHORS b/AUTHORS
index 67e1dc35fb..5e6d41d7c4 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -100,6 +100,7 @@ The following people have contributed code to GIMP:
  Marcelo de Gomensoro Malheiros
  Saul Goode
  David Gowers
+ Niels De Graef
  Cameron Gregory
  Eric Grivel
  Stephen Griffiths
diff --git a/authors.xml b/authors.xml
index 9db4a87211..b92b44f90e 100644
--- a/authors.xml
+++ b/authors.xml
@@ -109,6 +109,7 @@
   <contributor role="author" last-active="1.0">Marcelo de Gomensoro Malheiros</contributor>
   <contributor role="author" last-active="2.10">Saul Goode</contributor>
   <contributor role="author" last-active="2.8">David Gowers</contributor>
+  <contributor role="author" last-active="3.0">Niels De Graef</contributor>
   <contributor role="author" last-active="2.10">Cameron Gregory</contributor>
   <contributor role="author" last-active="2.8">Eric Grivel</contributor>
   <contributor role="author" last-active="2.8">Stephen Griffiths</contributor>