Update default gems list at 0044bac [ci skip]

Author: matzbot

NEWS.md

@@ -198,7 +198,7 @@ The following default gems are updated.
 * pp 0.6.3
 * prism 1.6.0
 * psych 5.2.6
-* resolv 0.6.2
+* resolv 0.6.3
 * stringio 3.1.8.dev
 * strscan 3.1.6.dev
 * timeout 0.4.4