Drop Ruby 3.0

Bump to Bundler v2.6.6 now that the minimum supported Ruby version is 3.1.

PiperOrigin-RevId: 738125541

Author: protobuf-github-bot

.github/workflows/test_ruby.yml

@@ -30,9 +30,8 @@ jobs:
         include:
           # Test both FFI and Native implementations on the highest and lowest
           # Ruby versions for CRuby and JRuby
-          - { name: Ruby 3.0, ruby: ruby-3.0.2, ffi: NATIVE, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:7.1.2-ruby-3.0.2-d9624f2aa83cba3eaf906f751d75b36aacb9aa82' }
-          - { name: Ruby 3.0, ruby: ruby-3.0.2, ffi: FFI, continuous-only: true, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:7.1.2-ruby-3.0.2-d9624f2aa83cba3eaf906f751d75b36aacb9aa82' }
-          - { name: Ruby 3.1, ruby: ruby-3.1.6, continuous-only: true }
+          - { name: Ruby 3.1, ruby: ruby-3.1.6, ffi: NATIVE }
+          - { name: Ruby 3.1, ruby: ruby-3.1.6, ffi: FFI }
           - { name: Ruby 3.2, ruby: ruby-3.2.6, continuous-only: true }
           - { name: Ruby 3.3, ruby: ruby-3.3.6, continuous-only: true }
           - { name: Ruby 3.4, ruby: ruby-3.4.1, ffi: NATIVE }
@@ -85,11 +84,11 @@ jobs:
       - name: Run tests
         uses: protocolbuffers/protobuf-ci/docker@v4
         with:
-          image: i386/ruby:3.0.2-buster
+          image: i386/ruby:3.1.6-bullseye
           credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
           command: >-
             /bin/bash -cex '
-            gem install bundler -v 2.5.13;
+            gem install bundler -v 2.6.6;
             cd /workspace/ruby;
             bundle;
             PROTOC=/workspace/${{ steps.cross-compile.outputs.protoc }} rake;
@@ -117,11 +116,11 @@ jobs:
   #     - name: Run tests
   #       uses: protocolbuffers/protobuf-ci/docker@v4
   #       with:
-  #         image: arm64v8/ruby:3.0.2-buster
+  #         image: arm64v8/ruby:3.1.6-bullseye
   #         credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
   #         command: >-
   #           /bin/bash -cex '
-  #           gem install bundler -v 2.5.13;
+  #           gem install bundler -v 2.6.6;
   #           cd /workspace/ruby;
   #           bundle;
   #           PROTOC=/workspace/${{ steps.cross-compile.outputs.protoc }} rake;
@@ -136,9 +135,8 @@ jobs:
         # Test both FFI and Native implementations on the highest and lowest
         # Ruby versions for CRuby.
         # Quote versions numbers otherwise 3.0 will render as 3
-        - { version: "3.0", ffi: NATIVE }
-        - { version: "3.0", ffi: FFI, continuous-only: true }
-        - { version: "3.1", continuous-only: true }
+        - { version: "3.1", ffi: NATIVE }
+        - { version: "3.1", ffi: FFI }
         - { version: "3.2", continuous-only: true }
         - { version: "3.3", continuous-only: true }
         - { version: "3.4", ffi: NATIVE }
@@ -180,9 +178,8 @@ jobs:
         include:
           # Test both FFI and Native implementations on the highest and lowest
           # Ruby versions for CRuby and JRuby.
-          - { name: Ruby 3.0, ruby: ruby-3.0.2, ffi: NATIVE, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:7.1.2-ruby-3.0.2-d9624f2aa83cba3eaf906f751d75b36aacb9aa82', continuous-only: true}
-          - { name: Ruby 3.0, ruby: ruby-3.0.2, ffi: FFI, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:7.1.2-ruby-3.0.2-d9624f2aa83cba3eaf906f751d75b36aacb9aa82', continuous-only: true}
-          - { name: Ruby 3.1, ruby: ruby-3.1.6, continuous-only: true}
+          - { name: Ruby 3.1, ruby: ruby-3.1.6, ffi: NATIVE }
+          - { name: Ruby 3.1, ruby: ruby-3.1.6, ffi: FFI }
           - { name: Ruby 3.2, ruby: ruby-3.2.6, continuous-only: true}
           - { name: Ruby 3.3, ruby: ruby-3.3.6, continuous-only: true}
           - { name: Ruby 3.4, ruby: ruby-3.4.1, ffi: NATIVE }

ruby/Gemfile.lock

@@ -41,4 +41,4 @@ DEPENDENCIES
   test-unit (~> 3.0, >= 3.0.9)
 
 BUNDLED WITH
-   2.5.23
+   2.6.6

ruby/Rakefile

@@ -155,7 +155,7 @@ else
   if RUBY_PLATFORM =~ /darwin/
     task 'gem:native' do
       system "rake genproto"
-      system "rake cross native gem RUBY_CC_VERSION=3.1.0:3.0.0:2.7.0"
+      system "rake cross native gem RUBY_CC_VERSION=3.1.0"
     end
   else
     task 'gem:native' => [:genproto, 'gem:windows', 'gem:java']

ruby/google-protobuf.gemspec

@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
       ext/google/protobuf_c/Rakefile
     ]
   end
-  s.required_ruby_version = '>= 3.0'
+  s.required_ruby_version = '>= 3.1'
   # bigdecimal must be used as a non-built in gem as of ruby-3.4
   s.add_dependency "bigdecimal"
   # TODO: evaluate removing Rakefile and moving logic to extconf.rb, so that we