Require Ruby >= 3.3 and update CI Ruby versions

Author: dduugg

.github/workflows/ci.yml

@@ -9,11 +9,8 @@ jobs:
       matrix:
         ruby:
           # See comment comes from https://github.com/ruby/setup-ruby#matrix-of-ruby-versions
-          # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
-          - '3.0'
-          - 3.1
-          - 3.2
           - 3.3
+          - 3.4
           - head
     env:
       BUNDLE_GEMFILE: Gemfile

code_manifest.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.summary = "A code manifest"
   spec.description = "A code manifest"
   spec.homepage = "https://github.com/rubyatscale/code_manifest"
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.7")
+  spec.required_ruby_version = Gem::Requirement.new(">= 3.3")
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/rubyatscale/code_manifest"