restore ruby 3.1 which is needed for jruby (#998)

Author: grosser

.github/workflows/test.yml

@@ -12,11 +12,11 @@ jobs:
     strategy:
       fail-fast: false # run all tests so we see which gem/ruby combinations break
       matrix:
-        ruby: ['3.2', '3.3', '3.4', head, jruby-head]
+        ruby: ['3.1', '3.2', '3.3', '3.4', head, jruby-head]
         os: [ubuntu-latest, windows-latest]
         task: [spec]
         include:
-          - ruby: '3.2' # lowest supported version, same as gemspec and .rubocop.yml
+          - ruby: '3.1' # lowest supported version, same as gemspec and .rubocop.yml
             os: ubuntu-latest
             task: rubocop
     steps:

.rubocop.yml

@@ -1,6 +1,6 @@
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 3.2
+  TargetRubyVersion: 3.1
   SuggestExtensions: false
   Exclude:
   - '**/vendor/bundle/**/*'

parallel_tests.gemspec

@@ -20,5 +20,5 @@ Gem::Specification.new name, ParallelTests::VERSION do |s|
   s.license = "MIT"
   s.executables = ["parallel_spinach", "parallel_cucumber", "parallel_rspec", "parallel_test"]
   s.add_dependency "parallel"
-  s.required_ruby_version = '>= 3.2.0'
+  s.required_ruby_version = '>= 3.1.0'
 end

spec/rails_spec.rb

@@ -15,6 +15,7 @@ def run(command, options = {})
     rails = File.basename(folder)
 
     it "can create and run #{rails}" do
+      skip 'ruby 3.1 is not supported by rails 72' if RUBY_VERSION < "3.2.0" && rails == "rails72"
       skip 'rails fixtures are not set up for java' if RUBY_PLATFORM == "java"
 
       Dir.chdir("spec/fixtures/#{rails}") do