Relax io-event dependency. (#200)

Author: ioquatix

async.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
 	spec.required_ruby_version = ">= 3.1.1"
 
 	spec.add_dependency "console", "~> 1.10"
-	spec.add_dependency "io-event", "~> 1.1.0"
+	spec.add_dependency "io-event", "~> 1.1"
 	spec.add_dependency "timers", "~> 4.1"
 
 	spec.add_development_dependency "async-rspec", "~> 1.1"