Added GH workflow (#28)

* Added GH workflow

* Increased Ruby version

Ruby 3.0 EOL was 2024-04-23 (https://endoflife.date/ruby)

.github/workflows/main.yml

@@ -0,0 +1,29 @@
+name: Ruby
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Ruby ${{ matrix.ruby }}
+    strategy:
+      matrix:
+        ruby:
+          - "3.1.0"
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run Standard
+        run: bundle exec standardrb
+      - name: Run the default task
+        run: bundle exec rake

.standard.yml

@@ -1,4 +1,4 @@
-ruby_version: 3.0
+ruby_version: 3.1.0
 ignore:
   - "tmp/**/*"
   - "test/**/*"

rails_icons.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
 
   spec.files = Dir["{bin,app,config,db,lib,public}/**/*", "Rakefile", "README.md", "rails_icons.gemspec", "Gemfile", "Gemfile.lock"]
 
-  spec.required_ruby_version = ">= 3.0.0"
+  spec.required_ruby_version = ">= 3.1.0"
   spec.add_dependency "rails", "> 6.1"
   spec.add_runtime_dependency "nokogiri", "~> 1.16", ">= 1.16.4"
 end