[ruby/io-wait] Bump up

https://github.com/ruby/io-wait/commit/0fa6e3f7ba
2022-06-25 18:10:38 +09:00 · 2022-06-25 18:10:38 +09:00 · 50e13870bf
--- a/ext/io/wait/io-wait.gemspec
+++ b/ext/io/wait/io-wait.gemspec
@ -1,4 +1,4 @@
-_VERSION = "0.2.3"
+_VERSION = "0.3.0.pre"

 Gem::Specification.new do |spec|
  spec.name          = "io-wait"