Actualize rubies list (#113)

.github/workflows/ruby.yml

@@ -6,7 +6,7 @@ jobs:
     continue-on-error: ${{ matrix.allow-failures }}
     strategy:
       matrix:
-        ruby: ['2.6', '2.7', '3.0', '3.1']
+        ruby: ['3.0', '3.1', '3.2']
         allow-failures: [false]
         include:
           - ruby: head

.rubocop.yml

@@ -7,4 +7,4 @@ inherit_from: .rubocop_todo.yml
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 3.0

CHANGELOG.md

@@ -15,7 +15,7 @@
 ### Changes
 
 * Allow failures on `ruby-head` in CI
-* Drop support of ruby 2.5 since it's EOLed
+* Drop support of `ruby-2.5`, `ruby-2.6`, `ruby-2.7` since it's EOLed
 * Freeze dependencies versions in `Gemfile.lock`
 * Check `dependabot` at 8:00 Moscow time daily
 * Changes from `rubocop-rspec` update to 2.9.0

onlyoffice_rake_code_linter.gemspec

@@ -7,7 +7,7 @@ Gem::Specification.new do |s|
   s.name = OnlyofficeRakeCodeLinter::NAME
   s.version = OnlyofficeRakeCodeLinter::VERSION
   s.platform = Gem::Platform::RUBY
-  s.required_ruby_version = '>= 2.5'
+  s.required_ruby_version = '>= 3.0'
   s.authors = ['ONLYOFFICE', 'Pavel Lobashov']
   s.email = %w[shockwavenn@gmail.com]
   s.summary = 'Lib with rake tasks to perform lint on source repos'