Drop ruby 2.x support

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: [ ruby-2.6, ruby-2.7, ruby-3.0, ruby-3.1, ruby-3.2 ]
+        ruby: [ ruby-3.0, ruby-3.1, ruby-3.2 ]
         os: [ ubuntu-latest ]
 
     steps:
@@ -76,7 +76,7 @@ jobs:
 
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.6
+          ruby-version: ruby-3.0
           bundler-cache: true
 
       - name: bundle exec rubocop

.rubocop.yml

@@ -8,4 +8,4 @@ AllCops:
   DefaultFormatter: fuubar
   DisplayCopNames: true
   NewCops: enable
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 3.0

README.md

@@ -111,8 +111,6 @@ This library aims to support and is [tested against][build-link]
 the following Ruby  versions:
 
 - JRuby 9.3
-- Ruby 2.6
-- Ruby 2.7
 - Ruby 3.0
 - Ruby 3.1
 - Ruby 3.2

http.gemspec

@@ -25,16 +25,14 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.version       = HTTP::VERSION
 
-  gem.required_ruby_version = ">= 2.6"
+  gem.required_ruby_version = ">= 3.0"
 
   gem.add_runtime_dependency "addressable",    "~> 2.8"
   gem.add_runtime_dependency "base64",         "~> 0.1"
   gem.add_runtime_dependency "http-cookie",    "~> 1.0"
   gem.add_runtime_dependency "http-form_data", "~> 2.2"
   gem.add_runtime_dependency "llhttp-ffi",     "~> 0.5.0"
 
-  gem.add_development_dependency "bundler", "~> 2.0"
-
   gem.metadata = {
     "source_code_uri"       => "https://github.com/httprb/http",
     "wiki_uri"              => "https://github.com/httprb/http/wiki",

lib/http/client.rb

@@ -16,7 +16,7 @@ class Client
     extend Forwardable
     include Chainable
 
-    HTTP_OR_HTTPS_RE = %r{^https?://}i.freeze
+    HTTP_OR_HTTPS_RE = %r{^https?://}i
 
     def initialize(default_options = {})
       @default_options = HTTP::Options.new(default_options)

lib/http/content_type.rb

@@ -2,8 +2,8 @@
 
 module HTTP
   class ContentType
-    MIME_TYPE_RE = %r{^([^/]+/[^;]+)(?:$|;)}.freeze
-    CHARSET_RE   = /;\s*charset=([^;]+)/i.freeze
+    MIME_TYPE_RE = %r{^([^/]+/[^;]+)(?:$|;)}
+    CHARSET_RE   = /;\s*charset=([^;]+)/i
 
     attr_accessor :mime_type, :charset
 

lib/http/headers.rb

@@ -13,11 +13,11 @@ class Headers
     include Enumerable
 
     # Matches HTTP header names when in "Canonical-Http-Format"
-    CANONICAL_NAME_RE = /\A[A-Z][a-z]*(?:-[A-Z][a-z]*)*\z/.freeze
+    CANONICAL_NAME_RE = /\A[A-Z][a-z]*(?:-[A-Z][a-z]*)*\z/
 
     # Matches valid header field name according to RFC.
     # @see http://tools.ietf.org/html/rfc7230#section-3.2
-    COMPLIANT_NAME_RE = /\A[A-Za-z0-9!#$%&'*+\-.^_`|~]+\z/.freeze
+    COMPLIANT_NAME_RE = /\A[A-Za-z0-9!#$%&'*+\-.^_`|~]+\z/
 
     # Class constructor.
     def initialize

lib/http/request.rb

@@ -24,7 +24,7 @@ class UnsupportedMethodError < RequestError; end
     class UnsupportedSchemeError < RequestError; end
 
     # Default User-Agent header value
-    USER_AGENT = "http.rb/#{HTTP::VERSION}"
+    USER_AGENT = "http.rb/#{HTTP::VERSION}".freeze
 
     METHODS = [
       # RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1

lib/http/request/writer.rb

@@ -15,7 +15,7 @@ class Writer
       CHUNKED = "chunked"
 
       # End of a chunked transfer
-      CHUNKED_END = "#{ZERO}#{CRLF}#{CRLF}"
+      CHUNKED_END = "#{ZERO}#{CRLF}#{CRLF}".freeze
 
       def initialize(socket, body, headers, headline)
         @body           = body

lib/http/uri.rb

@@ -38,7 +38,7 @@ class URI
     HTTPS_SCHEME = "https"
 
     # @private
-    PERCENT_ENCODE = /[^\x21-\x7E]+/.freeze
+    PERCENT_ENCODE = /[^\x21-\x7E]+/
 
     # @private
     NORMALIZER = lambda do |uri|