chore: drop < 2.3 support - clean CI, Rakefile, gemspec

Author: dbongo

.github/workflows/ci.yml

@@ -11,23 +11,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include:
-          # Legacy but still supported (Bundler 1.17)
-          - ruby: "2.1.9"
-            bundler: "1.17.3"
-          - ruby: "2.2.10"
-            bundler: "1.17.3"
-
-          # Regular supported versions
-          - ruby: "2.3.8"
-          - ruby: "2.4.10"
-          - ruby: "2.5.9"
-          - ruby: "2.6.7"
-          - ruby: "2.7.8"
-          - ruby: "3.0.6"
-          - ruby: "3.1.4"
-          - ruby: "3.2.3"
-          - ruby: "3.3.0"
+        ruby:
+          - "2.3.8"
+          - "2.4.10"
+          - "2.5.9"
+          - "2.6.7"
+          - "2.7.8"
+          - "3.0.6"
+          - "3.1.4"
+          - "3.2.3"
+          - "3.3.0"
 
     steps:
       - uses: actions/checkout@v4
@@ -36,20 +29,7 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
-
-      - name: Update RubyGems (for Ruby <= 2.2)
-        if: matrix.ruby == '2.2.10' || matrix.ruby == '2.1.9'
-        run: gem update --system 2.6.14
-
-      - name: Clear old gem cache (for Ruby <= 2.2)
-        if: matrix.ruby == '2.2.10' || matrix.ruby == '2.1.9'
-        run: |
-          gem sources --clear-all
-          rm -rf ~/.gem
-
-      - name: Install Bundler 1.17.3 (for Ruby <= 2.2)
-        if: matrix.ruby == '2.2.10' || matrix.ruby == '2.1.9'
-        run: gem install bundler -v 1.17.3 --force
+          bundler-cache: true   # automatic bundle caching
 
       - name: Install dependencies
         run: bundle install --jobs 3 --retry 3

Rakefile

@@ -4,18 +4,18 @@ require "rspec/core/rake_task"
 desc "Run specs"
 RSpec::Core::RakeTask.new(:spec)
 
-# Run the suite under every Ruby installed via rbenv/rvm
+# Run the suite under every Ruby installed via rbenv/rvm (2.3+ only)
 namespace :multi do
   task :spec do
     rubies = %w[
-      2.1.9 2.2.10 2.3.8 2.4.10 2.5.9
-      2.6.7 2.7.8 3.0.6 3.1.4 3.2.3 3.3.0
+      2.3.8 2.4.10 2.5.9
+      2.6.7 2.7.8 3.0.6
+      3.1.4 3.2.3 3.3.0
     ]
+
     rubies.each do |v|
       puts "\n=== Ruby #{v} ==="
-      bundler = v < "2.3" ? "1.17.3" : "2"
-      cmd = "RBENV_VERSION=#{v} bundle _#{bundler}_ exec rspec"
-      system(cmd) || abort("Failed on #{v}")
+      system("RBENV_VERSION=#{v} bundle exec rspec") || abort("Failed on #{v}")
     end
   end
 end

callable.gemspec

@@ -13,7 +13,7 @@ Gem::Specification.new do |spec|
                        "simplifying instantiation and method invocation."
   spec.homepage      = "https://github.com/dbongo/callable"
   spec.license       = "MIT"
-  spec.required_ruby_version = ">= 2.1.0"
+  spec.required_ruby_version = ">= 2.3.0"
 
   spec.metadata = {
     "homepage_uri"    => spec.homepage,
@@ -24,7 +24,6 @@ Gem::Specification.new do |spec|
   spec.files         = Dir["lib/**/*.rb", "LICENSE", "README.md"]
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "bundler", ">= 1.17"
-  spec.add_development_dependency "rake", "~> 12.3"
+  spec.add_development_dependency "rake",  "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end