update composer

Author: georgio

composer.json

@@ -30,7 +30,7 @@
         ]
     },
     "require": {
-        "php": "^7.3 || 8.0.*"
+        "php": "^7.2 || 8.0.*"
     },
     "require-dev": {
         "ext-dom": "*",
@@ -41,7 +41,7 @@
         "squizlabs/php_codesniffer": "^3.5",
         "symfony/var-dumper": "^5.1",
         "symfony/finder": "^5.1",
-        "phpunit/phpunit": "9.5.8",
+        "phpunit/phpunit": "^8.5",
         "friendsofphp/php-cs-fixer": "^3.0"
     },
     "suggest": {