Update minimum Ruby version to 2.7

Author: jgarber623

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
       fail-fast: false
       matrix:
         # See: https://github.com/actions/runner/issues/849
-        ruby: [2.6, 2.7, "3.0", 3.1]
+        ruby: [2.7, "3.0", 3.1]
     steps:
       - uses: actions/checkout@v3
       - uses: ruby/setup-ruby@v1

.ruby-version

@@ -1 +1 @@
-2.6.10
+2.7.6

CONTRIBUTING.md

@@ -8,9 +8,9 @@ There are a couple ways you can help improve link-header-parser-ruby:
 
 ## Getting Started
 
-link-header-parser-ruby is developed using Ruby 2.6.10 and is additionally tested against Ruby 2.7, 3.0, and 3.1 using [GitHub Actions](https://github.com/jgarber623/link-header-parser-ruby/actions).
+link-header-parser-ruby is developed using Ruby 2.7.6 and is additionally tested against Ruby 3.0 and 3.1 using [GitHub Actions](https://github.com/jgarber623/link-header-parser-ruby/actions).
 
-Before making changes to link-header-parser-ruby, you'll want to install Ruby 2.6.10. It's recommended that you use a Ruby version managment tool like [rbenv](https://github.com/rbenv/rbenv), [chruby](https://github.com/postmodern/chruby), or [rvm](https://github.com/rvm/rvm). Once you've installed Ruby 2.6.10 using your method of choice, install the project's gems by running:
+Before making changes to link-header-parser-ruby, you'll want to install Ruby 2.7.6. It's recommended that you use a Ruby version managment tool like [rbenv](https://github.com/rbenv/rbenv), [chruby](https://github.com/postmodern/chruby), or [rvm](https://github.com/rvm/rvm). Once you've installed Ruby 2.7.6 using your method of choice, install the project's gems by running:
 
 ```sh
 bundle install

README.md

@@ -10,9 +10,9 @@
 
 ## Getting Started
 
-Before installing and using link-header-parser-ruby, you'll want to have [Ruby](https://www.ruby-lang.org) 2.6 (or newer) installed. It's recommended that you use a Ruby version managment tool like [rbenv](https://github.com/rbenv/rbenv), [chruby](https://github.com/postmodern/chruby), or [rvm](https://github.com/rvm/rvm).
+Before installing and using link-header-parser-ruby, you'll want to have [Ruby](https://www.ruby-lang.org) 2.7 (or newer) installed. It's recommended that you use a Ruby version managment tool like [rbenv](https://github.com/rbenv/rbenv), [chruby](https://github.com/postmodern/chruby), or [rvm](https://github.com/rvm/rvm).
 
-link-header-parser-ruby is developed using Ruby 2.6.10 and is additionally tested against Ruby 2.7, 3.0, and 3.1 using [GitHub Actions](https://github.com/jgarber623/link-header-parser-ruby/actions).
+link-header-parser-ruby is developed using Ruby 2.7.6 and is additionally tested against Ruby 3.0 and 3.1 using [GitHub Actions](https://github.com/jgarber623/link-header-parser-ruby/actions).
 
 ## Installation
 

link-header-parser.gemspec

@@ -3,7 +3,7 @@
 require_relative 'lib/link_header_parser/version'
 
 Gem::Specification.new do |spec|
-  spec.required_ruby_version = '>= 2.6', '< 4'
+  spec.required_ruby_version = '>= 2.7', '< 4'
 
   spec.name          = 'link-header-parser'
   spec.version       = LinkHeaderParser::VERSION