[ruby/io-console] Bump version to 0.6.0

https://github.com/ruby/io-console/commit/441528e3eb
2022-12-16 12:44:31 +09:00 · 2022-12-16 12:44:31 +09:00 · d95ee11462
--- a/ext/io/console/io-console.gemspec
+++ b/ext/io/console/io-console.gemspec
@ -1,5 +1,5 @@
 # -*- ruby -*-
-_VERSION = "0.5.11"
+_VERSION = "0.6.0"

 Gem::Specification.new do |s|
  s.name = "io-console"