Merge pull request #26 from php-school/php81-support

Support PHP 8.1

Author: AydinHassan

composer.json

@@ -12,14 +12,14 @@
         }
     ],
     "require" : {
-        "php" : ">=7.3",
-        "php-school/php-workshop": "^4.0"
+        "php": ">=7.3",
+        "php-school/php-workshop": "^4.0.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^9",
-        "squizlabs/php_codesniffer": "^3.5",
+        "squizlabs/php_codesniffer": "^3.7",
         "composer/composer": "^2.0",
-        "phpstan/phpstan": "^0.12.52"
+        "phpstan/phpstan": "^1.8.11"
     },
     "autoload" : {
         "psr-4" : {