Drop legacy Rails and Ruby support

- Drop Ruby < 3.1.0
- Drop Rails < 7.0.0

.github/workflows/ci.yml

@@ -10,45 +10,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [3.3, 3.2, 3.1, '3.0', 2.7, 2.6, ruby-head]
-        rails: ['7.2.0', '7.1.0', '7.0.0', '6.1.0', '6.0.0', main]
+        ruby: [3.3, 3.2, 3.1, ruby-head]
+        rails: ['7.2.0', '7.1.0', '7.0.0', main]
         exclude:
           - ruby: ruby-head
             rails: '7.0.0'
-          - ruby: ruby-head
-            rails: '6.1.0'
-          - ruby: ruby-head
-            rails: '6.0.0'
-          - ruby: 3.3
-            rails: '6.1.0'
-          - ruby: 3.3
-            rails: '6.0.0'
-          - ruby: 3.2
-            rails: '6.0.0'
           - ruby: 3.1
-            rails: '6.0.0'
-          - ruby: 3.0
-            rails: main
-          - ruby: 3.0
-            rails: '7.2.0'
-          - ruby: 3.0
-            rails: '6.0.0'
-          - ruby: 2.7
             rails: main
-          - ruby: 2.7
-            rails: '7.2.0'
-          - ruby: 2.6
-            rails: main
-          - ruby: 2.6
-            rails: '7.2.0'
-          - ruby: 2.6
-            rails: '7.1.0'
-          - ruby: 2.6
-            rails: '7.0.0'
-          - ruby: 2.6
-            rails: '6.1.0'
-          - ruby: 2.6
-            rails: '6.0.0'
 
     env:
       RAILS_VERSION: ${{ matrix.rails }}

Gemfile

@@ -1,14 +1,14 @@
 source 'https://rubygems.org'
 
 rails_version = ENV['RAILS_VERSION'] || "default"
-require_sqlite3_1x = %w[7.0.0 6.1.0 6.0.0].include?(rails_version)
+require_sqlite3_1x = %w[7.0.0].include?(rails_version)
 
 rails =
   case rails_version
   when 'main'
     { github: 'rails/rails' }
   when 'default'
-    '>= 6.0'
+    '>= 7.0'
   else
     "~> #{ENV['RAILS_VERSION']}"
   end

jsonapi-rails.gemspec

@@ -16,12 +16,12 @@ Gem::Specification.new do |spec|
   spec.files         = Dir['README.md', 'lib/**/*']
   spec.require_path  = 'lib'
 
-  spec.required_ruby_version = '>= 2.5.0'
+  spec.required_ruby_version = '>= 3.1.0'
 
   spec.add_dependency 'jsonapi-rb', '~> 0.5.0'
   spec.add_dependency 'jsonapi-parser', '~> 0.1.0'
 
-  spec.add_development_dependency 'rails', '>= 6.0'
+  spec.add_development_dependency 'rails', '>= 7.0'
   spec.add_development_dependency 'sqlite3', '>= 1.3'
   spec.add_development_dependency 'rake',        '>= 11.3'
   spec.add_development_dependency 'rspec-rails', '>= 4.0'