test php8

Author: okbang9

.github/workflows/test-ci.yml

@@ -34,7 +34,6 @@ jobs:
           composer self-update
           composer install --no-interaction --prefer-source --dev
 
-
       - name: Run cases
         run: |
           ./vendor/bin/phpcs --standard=PSR2 src

composer.json

@@ -16,7 +16,7 @@
         "php": ">=5.3.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "~9.0",
+        "phpunit/phpunit": "=9.0.0",
         "squizlabs/php_codesniffer": "~3.6"
     },
     "autoload": {