Improve test matrix for D8 + D9

[mglaman]

This moves from TravisCI to GitHub Actions. It also ensures we're testing on D9.

PHP8 was skipped due to drupal/core-dev-pinned referencing phar-io/manifest:1.0.3 which does not support PHP 8. However, using drupal/core-dev would allow phar-io/manifest:^2.0. Moving that to another PR.

[mglaman]

Spin out into two workflows. There should be one workflow for PHPCS, PHPStan, PHPUnit. One workflow for the Drupal integrations.

For example, first workflow:

    steps:
      - name: "Checkout"
        uses: "actions/checkout@v2"
      - name: "Install PHP"
        uses: "shivammathur/setup-php@v2"
        with:
          coverage: "none"
          php-version: "${{ matrix.php-version }}"
          tools: composer:v2
          extensions: dom, curl, libxml, mbstring, zip, pdo, mysql, pdo_mysql, bcmath, gd, exif, iconv
      - name: "Install dependencies"
        run: "composer update --no-progress --prefer-dist"
      - name: "Downgrade dev dependencies"
        run: "composer require phpunit/phpunit:^7.5 drupal/core-recommended:${{ matrix.drupal }} --with-all-dependencies"
        if: ${{ matrix.drupal == '~8.9' }}
      - name: "PHPCS"
        run: "php vendor/bin/phpcs src"
      - name: "PHPStan"
        run: "php vendor/bin/phpstan analyze src"
      - name: "PHPUnit"
        run: "php vendor/bin/phpunit --debug"

Second workflow:

     - name: Setup Drupal
        run: |
          COMPOSER_MEMORY_LIMIT=-1 composer create-project drupal/recommended-project:${{ matrix.drupal }} ~/drupal --no-interaction
          cd ~/drupal
          composer config minimum-stability dev
          composer config prefer-stable true
          composer config preferred-install dist
          composer config repositories.0 path $GITHUB_WORKSPACE
          composer config repositories.1 composer https://packages.drupal.org/8
          COMPOSER_MEMORY_LIMIT=-1 composer require drupal/core-dev-pinned:${{ matrix.drupal }} --no-suggest
      - name: "require phpstan-drupal"
        run: |
          cd ~/drupal
          COMPOSER_MEMORY_LIMIT=-1 composer require mglaman/phpstan-drupal *@dev
          cp $GITHUB_WORKSPACE/tests/fixtures/config/drupal-phpstan.neon phpstan.neon
      - name: "Test core/install.php"
        run: |
          cd ~/drupal
          ./vendor/bin/phpstan analyze web/core/install.php --debug
      - name: "Test BrowserTestBase is autoloaded"
        run: |
          cd ~/drupal
          ./vendor/bin/phpstan analyze web/core/modules/dynamic_page_cache | grep -q "Class Drupal\Tests\BrowserTestBase not found and could not be autoloaded." && false || true
      - name: "Verify test fixtures are ignored."
        run: |
          cd ~/drupal
          ./vendor/bin/phpstan analyze web/core/modules/migrate_drupal --no-progress | grep -q "tests/fixtures" && false || true
      - name: 'Check "Cannot redeclare token_theme() due to blazy_test.module"'
        run: |
          cd ~/drupal
          COMPOSER_MEMORY_LIMIT=-1 composer require drupal/token drupal/blazy
          ./vendor/bin/phpstan analyze web/modules/contrib/blazy --no-progress || if (($? == 255)); then false; else true; fi

[mglaman]

Last failure seems to be on downgrading drupal/core and composer/installers breaking with composer v2

[mglaman]

New idea:

• remove drupal/core packages from require-dev
• create a custom @requires annotation to specify the major version of drupal the test is for
• the pipeline runs composer require --dev of specific Drupal major version

[mglaman]

For @require drupal 8 and @require drupal 9, see \Drupal\Tests\TestRequirementsTrait.

Parse from $annotations = $this->getAnnotations();