Drop support for Ruby 2.6 and 2.7

Author: johnnyshields

.github/workflows/test.yml

@@ -9,12 +9,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04] # macos-latest
-        ruby-version: [2.6, 2.7, 3.0, 3.1, 3.2, jruby-9.3, jruby-9.4, truffleruby]
+        ruby-version: [3.0, 3.1, 3.2, jruby-9.3, jruby-9.4, truffleruby]
         include:
-          - os: macos-latest
-            ruby-version: 2.6
-          - os: macos-latest
-            ruby-version: 2.7
           - os: macos-latest
             ruby-version: 3.0
           - os: macos-latest

.rubocop.yml

@@ -6,7 +6,7 @@ require:
   - rubocop-rake
 
 AllCops:
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 3.0
   NewCops: enable
   Include:
     - 'lib/**/*'

README.md

@@ -20,8 +20,6 @@ We created a demo project for Rails 4 that uses the latest version of this libra
 
 ### Supported Ruby Versions
 
-* 2.6
-* 2.7
 * 3.0
 * 3.1
 * 3.2

ruby-saml.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.rdoc_options = ["--charset=UTF-8"]
   s.require_paths = ["lib"]
   s.rubygems_version = %q{1.3.7}
-  s.required_ruby_version = '>= 2.6.0'
+  s.required_ruby_version = '>= 3.0'
   s.summary = %q{SAML Ruby Tookit}
 
   s.add_dependency('nokogiri', '>= 1.13.10')