Move all composer files inside the common directory

- 2022년 3월 개발팀 결정사항 적용
- 모듈 등 서드파티 자료 개발시 composer를 사용하면 상위 경로에 있는 코어의
  composer.json을 수정하고, 코어의 vendor 디렉토리를 건드리는 것이 기본값임
- 이를 방지하기 위해 코어의 composer.json과 vendor를 common 디렉토리 안으로
  이동하여, 모듈 경로에서 상위 폴더로 인식하지 않도록 함

common/vendor/league/html-to-markdown/.github/workflows/tests.yml

@@ -0,0 +1,104 @@
+name: Tests
+
+on:
+    push: ~
+    pull_request: ~
+
+jobs:
+    phpcs:
+        name: PHPCS
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v2
+
+            - uses: shivammathur/setup-php@v2
+              with:
+                  php-version: 7.2
+                  extensions: curl, mbstring
+                  coverage: none
+                  tools: composer:v2, cs2pr
+
+            - run: composer update --no-progress
+
+            - run: vendor/bin/phpcs -q --report=checkstyle | cs2pr
+
+    phpunit:
+        name: PHPUnit on ${{ matrix.php }} ${{ matrix.composer-flags }}
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                php: ['7.2', '7.3', '7.4']
+                coverage: [true]
+                composer-flags: ['']
+                include:
+                    - php: '8.0'
+                      coverage: false
+                      composer-flags: '--ignore-platform-req=php'
+                    - php: '7.2'
+                      coverage: false
+                      composer-flags: '--prefer-lowest'
+
+        steps:
+            - uses: actions/checkout@v2
+
+            - uses: shivammathur/setup-php@v2
+              with:
+                  php-version: ${{ matrix.php }}
+                  extensions: curl, mbstring
+                  coverage: pcov
+                  tools: composer:v2
+
+            - run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+
+            - name: "Use PHPUnit 9.3+ on PHP 8"
+              run: composer require --no-update --dev phpunit/phpunit:^9.3
+              if: "matrix.php == '8.0'"
+
+            - run: composer update --no-progress ${{ matrix.composer-flags }}
+
+            - run: vendor/bin/phpunit --no-coverage
+              if: ${{ !matrix.coverage }}
+
+            - run: vendor/bin/phpunit --coverage-text --coverage-clover=coverage.clover
+              if: ${{ matrix.coverage }}
+
+            - run: php vendor/bin/ocular code-coverage:upload --format=php-clover coverage.clover
+              if: ${{ matrix.coverage }}
+              continue-on-error: true
+
+    phpstan:
+        name: PHPStan
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v2
+
+            - uses: shivammathur/setup-php@v2
+              with:
+                  php-version: 7.2
+                  extensions: curl, mbstring
+                  coverage: none
+                  tools: composer:v2
+
+            - run: composer update --no-progress
+
+            - run: vendor/bin/phpstan analyse --no-progress
+
+    psalm:
+        name: Psalm
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v2
+
+            - uses: shivammathur/setup-php@v2
+              with:
+                  php-version: 7.2
+                  extensions: curl, mbstring
+                  coverage: none
+                  tools: composer:v2
+
+            - run: composer update --no-progress
+
+            - run: vendor/bin/psalm --no-progress --output-format=github