Update Ruby to 3.4.4

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1.244.0
       with:
-        ruby-version: '3.3.7' # Match the project's .ruby-version file
+        ruby-version: '3.4.4' # Match the project's .ruby-version file
         bundler-cache: true # Runs 'bundle install' and caches installed gems automatically
 
     - name: Run RuboCop

.rubocop.yml

@@ -1,5 +1,5 @@
 AllCops:
-  TargetRubyVersion: 3.3
+  TargetRubyVersion: 3.4
   DisplayCopNames: true
 
 PercentLiteralDelimiters:

.ruby-version

@@ -1 +1 @@
-3.3.7
+3.4.4

AGENTS.md

@@ -1,6 +1,6 @@
 # Development Guidelines
 
-This project is a MapReduce framework implemented in Ruby. Development targets Ruby 3.3 and uses Bundler for dependency management.
+This project is a MapReduce framework implemented in Ruby. Development targets Ruby 3.4 and uses Bundler for dependency management.
 
 ## Setup
 

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.7.4
+FROM ruby:3.4.4
 
 WORKDIR /app
 

simple_map_reduce.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r(^exe/)) { |f| File.basename(f) }
   spec.require_paths = ['lib']
-  spec.required_ruby_version = '>= 3.3.7'
+  spec.required_ruby_version = '>= 3.4.4'
 
   spec.add_development_dependency 'bundler', '>= 2.5'
   spec.add_development_dependency 'factory_bot', '~> 6.5', '>= 6.5.1'