[gimp-web/testing] Update GIMP_VERSIONS for 2.10.6 source code release

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 09c765888c8cbc090ea03be39335fd50e21dbf9b
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Sun Aug 19 21:30:09 2018 +0300

    Update GIMP_VERSIONS for 2.10.6 source code release

 GIMP_VERSIONS | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/GIMP_VERSIONS b/GIMP_VERSIONS
index 4476d58b..5acd724e 100644
--- a/GIMP_VERSIONS
+++ b/GIMP_VERSIONS
@@ -1,6 +1,16 @@
 {
     "STABLE":  {
 
+        "2.10.6": {
+            "date": "2018-08-19",
+            "source": {
+                "gimp-2.10.6.tar.bz2": {
+                        "sha512": 
"1330ec756ec5f57243435e66aeb5f6214a9783e26763be6679714010a631e47dbb8b5f610195587af29261d2183332a4a4c6202acafc3f2837ae7a6b7f9a30c2",
+                        "sha256": "4ec8071f828e918384cf7bc7d1219210467c84655123f802bc55a8bf2415101f",
+                }
+            },
+        }
+
         "2.10.4": {
             "date": "2018-07-04",
             "source": {