Remove support for Ruby 2.7.x

.gitlab-ci.yml

@@ -17,7 +17,7 @@ workflow:
     - bundle install -j $(nproc)                # Install dependencies into ./vendor/ruby
   parallel:
     matrix:
-      - RUBY_VERSION: ['2.7', '3.0', '3.1', '3.2']
+      - RUBY_VERSION: ['3.0', '3.1', '3.2']
   image: "ruby:$RUBY_VERSION"
   cache:
     paths:
@@ -79,7 +79,7 @@ secret_detection:
 
 update-changelog:
   stage: deploy
-  image: ruby:2.7
+  image: ruby:3.0
   rules:
     - if: '$GITLAB_API_TOKEN == null'
       when: never

.rubocop.yml

 AllCops:
-  TargetRubyVersion: 2.7
+  TargetRubyVersion: 3.0
   Exclude:
     - '*.gemspec'
     - 'vendor/**/*'

lib/tanuki_emoji/character.rb

@@ -8,8 +8,8 @@ module TanukiEmoji
   class Character
     IMAGE_PREFIX = 'emoji_u'
     IMAGE_EXTENSION = '.png'
-    FLAG_REGEXP = /[🇦-🇿]{2}/u.freeze
-    ALPHA_CODE_REGEXP = /:(?<alpha_text>[_+\-a-z0-9]+):/.freeze
+    FLAG_REGEXP = /[🇦-🇿]{2}/u
+    ALPHA_CODE_REGEXP = /:(?<alpha_text>[_+\-a-z0-9]+):/
 
     # This denotes a "color" or "emoji" version
     EMOJI_VARIATION_SELECTOR = 0xFE0F

tanuki_emoji.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description   = %q{Tanuki Emoji provides Emoji character information and metadata with support for Noto Emoji resources as fallback}
   spec.homepage      = 'https://gitlab.com/gitlab-org/ruby/gems/tanuki_emoji'
   spec.licenses       = %w[MIT Apache2]
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.7.0")
+  spec.required_ruby_version = Gem::Requirement.new(">= 3.0.0")
 
   spec.metadata['homepage_uri'] = spec.homepage
   spec.metadata['source_code_uri'] = spec.homepage