[gimp-book-painting] gimp-book-painting.doap: add myself as maintainer so I can configure gitlab

[Michael Natterer <mitch src gnome org>]

commit 89ad3841c4e425be847b751e15257f7386e8721f
Author: Michael Natterer <mitch gimp org>
Date:   Mon Jul 1 18:16:06 2019 +0200

    gimp-book-painting.doap: add myself as maintainer so I can configure gitlab

 gimp-book-painting.doap | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/gimp-book-painting.doap b/gimp-book-painting.doap
index f9e1674..05692b2 100644
--- a/gimp-book-painting.doap
+++ b/gimp-book-painting.doap
@@ -19,12 +19,14 @@
       <gnome:userid>amerigo</gnome:userid>
     </foaf:Person>
   </maintainer>
+
   <maintainer>
     <foaf:Person>
       <foaf:name>Aryeom Han</foaf:name>
       <gnome:userid>aryeomhan</gnome:userid>
     </foaf:Person>
   </maintainer>
+
   <maintainer>
     <foaf:Person>
       <foaf:name>Jehan</foaf:name>
@@ -32,4 +34,11 @@
     </foaf:Person>
   </maintainer>
 
+  <maintainer>
+    <foaf:Person>
+      <foaf:name>Michael Natterer</foaf:name>
+      <gnome:userid>mitch</gnome:userid>
+    </foaf:Person>
+  </maintainer>
+
 </Project>