Only run phplint at php 8.0

Do not run codeception at php 8.0(currently not works)

.github/workflows/ci.yml

@@ -11,7 +11,8 @@ jobs:
     strategy:
       matrix:
         operating-system: [ ubuntu-16.04 ]
-        php: [ '7.0', '7.1', '7.2', '7.3', '7.4' ]
+        php: [ '7.0', '7.1', '7.2', '7.3', '7.4', '8.0' ]
+    
     name: PHP ${{ matrix.php }}
     steps:
     - uses: actions/checkout@v2
@@ -22,22 +23,28 @@ jobs:
         php-version: ${{ matrix.php }}
     
     - name: Start MySQL
+      if: matrix.php != '8.0'
       run: sudo systemctl start mysql.service
     
     - name: Create database
+      if: matrix.php != '8.0'
       run: mysql -uroot -proot -e "CREATE DATABASE rhymix CHARSET utf8mb4 COLLATE utf8mb4_unicode_ci"
     
     - name: Create user and set privileges
+      if: matrix.php != '8.0'
       run: mysql -uroot -proot -e "create user 'travis'@'localhost' identified by 'travis'; FLUSH PRIVILEGES" && mysql -uroot -proot -e "GRANT ALL PRIVILEGES ON rhymix.* TO travis@localhost"
     
     - name: Download codeception
+      if: matrix.php != '8.0'
       run: wget https://codeception.com/releases/2.3.9/codecept.phar
     
     - name: Run PHP development server
+      if: matrix.php != '8.0'
       run: php -S localhost:8000 &
 
     - name: PHP Lint
       run: if find . -name "*.php" ! -path "./vendor/*" -print0 | xargs -0 -n 1 -P 8 php -l | grep -v "No syntax errors detected"; then exit 1; fi
     
     - name: Build and run codeception
+      if: matrix.php != '8.0'
       run: php codecept.phar build && php codecept.phar run --debug --fail-fast --env travis