Mark DO valid for 1.6.x

MOARdV · MOARdV · commit 1d2edb3a1a53 · 2018-12-20T17:13:24.000-06:00
diff --git a/GameData/DistantObject/DistantObject.version b/GameData/DistantObject/DistantObject.version
@@ -21,7 +21,7 @@
   "KSP_VERSION_MAX":
   {
     "MAJOR": 1,
-    "MINOR": 5,
+    "MINOR": 6,
     "PATCH": 99
   }
 }
