Require Ruby 3.1.0 or later

Author: jcouball

command_line_boss.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   DESCRIPTION
   spec.homepage = "TODO: Put your gem's website or public repo URL here."
   spec.license = "MIT"
-  spec.required_ruby_version = ">= 3.0.0"
+  spec.required_ruby_version = ">= 3.1.0"
 
   spec.metadata["allowed_push_host"] = "TODO: Set to your gem server 'https://example.com'"