Clean up Github CI workflow

.github/workflows/main.yml

@@ -1,27 +1,25 @@
-name: Ruby
+name: CI
 
 on:
-  push:
-    branches:
-      - main
-
   pull_request:
+  push:
+    branches: [main]
 
 jobs:
-  build:
+  check:
     runs-on: ubuntu-latest
-    name: Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
-        ruby:
-          - '3.3.5'
-
+        ruby-version: [3.3.5]
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: ${{ matrix.ruby }}
-        bundler-cache: true
-    - name: Run the default task
-      run: bundle exec rake
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
+
+      - name: Run the default task
+        run: bundle exec rake

Rakefile

@@ -1,7 +1,10 @@
 require 'bundler/gem_tasks'
 require 'rspec/core/rake_task'
 require 'rubocop/rake_task'
+require 'syntax_tree/rake_tasks'
 
 RSpec::Core::RakeTask.new(:spec)
 RuboCop::RakeTask.new
-task default: %i[spec rubocop]
+SyntaxTree::Rake::CheckTask.new
+
+task default: %i[spec rubocop stree:check]