Magento phpcs using GitHub Actions

coding-standards.yml

name: Coding Standards

on:
  pull_request:
    paths:
      - "**.php"
      - "**.phtml"

jobs:
  phpcs:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - uses: shivammathur/setup-php@v2
        with:
          php-version: '7.4'

      - name: Install dependencies
        run: |
          composer install --no-dev --no-progress

      - uses: tinovyatkin/action-php-codesniffer@v1
        with:
          files: "**"
          scope: files
          phpcs_path: vendor/bin/phpcs
          standard: vendor/magento/magento-coding-standard/Magento2/ruleset.xml

composer.json

{
    "name": "vendor/name",
    "description": "N/A",
    "require": {
        "magento/magento-coding-standard": "^6.0"
    }    
}

Note that I'm not using require-dev because of the specifics of the project I work on. So it should be "require-dev" and composer install --no-progress for a real-word extension's codestyle-check case