[ruby/io-nonblock] Bump up 0.3.1

ruby/io-nonblock@16727a8ab3

Author: hsbt

ext/io/nonblock/io-nonblock.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |spec|
   spec.name          = "io-nonblock"
-  spec.version       = "0.3.0"
+  spec.version       = "0.3.1"
   spec.authors       = ["Nobu Nakada"]
   spec.email         = ["[email protected]"]