ruby: remove support for ruby < 3.0

Author: gi

.rubocop.yml

@@ -1,10 +1,10 @@
-require:
+plugins:
   - rubocop-performance
   - rubocop-rake
   - rubocop-rspec
 
 AllCops:
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 3.0
   Exclude:
     - bin/**/*
     - vendor/**/*
@@ -148,6 +148,9 @@ RSpec/ExampleLength:
     - hash
     - heredoc
 
+RSpec/IncludeExamples:
+  Enabled: false
+
 RSpec/MultipleMemoizedHelpers:
   Max: 20
 

handlebars-engine.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
 
   spec.homepage = "https://github.com/gi/handlebars-ruby"
   spec.license = "MIT"
-  spec.required_ruby_version = ">= 2.6.0"
+  spec.required_ruby_version = ">= 3.0"
 
   spec.metadata["changelog_uri"] = "#{spec.homepage}/CHANGELOG.md"
   spec.metadata["github_repo"] = spec.homepage

spec/handlebars/engine_spec.rb

@@ -40,7 +40,7 @@
       end
 
       it "does not create the context" do
-        expect(engine_context).to be nil
+        expect(engine_context).to be_nil
       end
     end