Update default gems list at 50e13870bf [ci skip]

NEWS.md

@@ -158,7 +158,7 @@ Note: We're only listing outstanding class updates.
     * etc 1.4.0
     * io-console 0.5.11
     * io-nonblock 0.1.1
-    * io-wait 0.2.3
+    * io-wait 0.3.0.pre
     * ipaddr 1.2.4
     * json 2.6.2
     * logger 1.5.1