adding test matrix for ruby and rails versions

.github/workflows/test.yml

@@ -0,0 +1,60 @@
+name: Test & lint
+on: [push, pull_request]
+
+env:
+  RAILS_ENV: test
+  PGHOST: localhost
+  PGUSER: postgres
+
+jobs:
+  tests:
+    name: Test
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ['2.7', '3.0', '3.1', '3.2', '3.3']
+        gemfile: ['gemfiles/rails_6_1.gemfile',
+                  'gemfiles/rails_7_0.gemfile',
+                  'gemfiles/rails_7_1.gemfile',
+                  'gemfiles/rails_7_2.gemfile']
+
+    env:
+      BUNDLE_GEMFILE: ${{ matrix.gemfile }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+
+      - name: Install dependencies
+        run: bundle install --jobs 4 --retry 3
+
+      - name: Run tests
+        run: bin/check
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.3
+          bundler-cache: true
+
+      - name: Install dependencies
+        run: bundle install --jobs 4 --retry 3
+
+      - name: Run linters
+        run: bin/fastcheck

Gemfile

@@ -10,7 +10,7 @@ group :development do
 end
 
 group :development, :test do
+  gem "minitest"
   gem "rake"
   gem "standard"
-  gem "minitest"
 end

moirai.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = ">= 2.6.0"
+  spec.required_ruby_version = ">= 2.7.0"
   spec.add_dependency "rails", ">= 7.2.1"
 
   spec.license = "MIT"