Update default gems list at ddf0080 [ci skip]

Author: matzbot

NEWS.md

@@ -141,7 +141,7 @@ The following default gems are updated.
 * fcntl 1.2.0
 * fiddle 1.1.6.dev
 * fileutils 1.7.3
-* io-console 0.8.0.beta1
+* io-console 0.8.0
 * io-nonblock 0.3.1
 * ipaddr 1.2.7
 * irb 1.14.1