Drop ruby 2.3 support (#760)

.github/workflows/windows.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.7, 2.6, 2.5, 2.4, 2.3]
+        ruby: [2.7, 2.6, 2.5, 2.4]
     steps:
     - uses: actions/checkout@master
     - name: Set up Ruby

.travis.yml

@@ -1,7 +1,6 @@
 env:
   - RUBYOPT=-W0
 rvm:
-  - 2.3
   - 2.4
   - 2.5
   - 2.6

parallel_tests.gemspec

@@ -16,5 +16,5 @@ Gem::Specification.new name, ParallelTests::VERSION do |s|
   s.license = "MIT"
   s.executables = ["parallel_spinach", "parallel_cucumber", "parallel_rspec", "parallel_test"]
   s.add_runtime_dependency "parallel"
-  s.required_ruby_version = '>= 2.3.0'
+  s.required_ruby_version = '>= 2.4.0'
 end

spec/integration_spec.rb

@@ -426,7 +426,7 @@ def test_unicode
       write "features/fail2.feature", "Feature: xxx\n  Scenario: xxx\n    Given I fail"
       results = run_tests "features", :processes => 3, :type => "cucumber", :fail => true
 
-      failing_scenarios = if Gem.win_platform? && Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("2.4")
+      failing_scenarios = if Gem.win_platform?
         ["cucumber features/fail1.feature:2 # Scenario: xxx", "cucumber features/fail2.feature:2 # Scenario: xxx"]
       else
         ["cucumber features/fail2.feature:2 # Scenario: xxx", "cucumber features/fail1.feature:2 # Scenario: xxx"]

spec/parallel_tests/test/runner_spec.rb

@@ -41,7 +41,7 @@ def call(*args)
     end
 
     it "uses given when passed found" do
-      result = Gem.win_platform? && Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("2.4") ? [["a", "b"], ["c"]] : [["a", "c"], ["b"]]
+      result = Gem.win_platform? ? [["a", "b"], ["c"]] : [["a", "c"], ["b"]]
       expect(call(["a", "b", "c"], 2, group_by: :found)).to eq(result)
     end