Dropped support for Ruby < 3.3

Author: ankane

.github/workflows/build.yml

@@ -11,15 +11,11 @@ jobs:
             os: ubuntu-24.04
             valgrind: true
           - ruby: 3.4
-            os: ubuntu-24.04
-          - ruby: 3.3
             os: macos-26
-          - ruby: 3.2
-            os: ubuntu-22.04
-          - ruby: 3.1
+          - ruby: 3.3
             os: macos-15-intel
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.18.0 (unreleased)
+
+- Dropped support for Ruby < 3.3
+
 ## 0.17.1 (2026-02-19)
 
 - Fixed error with Rice 4.11

or-tools.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
   spec.require_path  = "lib"
   spec.extensions    = ["ext/or-tools/extconf.rb"]
 
-  spec.required_ruby_version = ">= 3.1"
+  spec.required_ruby_version = ">= 3.3"
 
   spec.add_dependency "rice", ">= 4.8"
 end