Update composer

Author: dantleech

Diff for: composer.json

@@ -13,15 +13,15 @@
         "rss": "https://github.com/phly/phly-event-dispatcher/releases.atom"
     },
     "require": {
-        "php": "^7.3||^8.0",
+        "php": "^8.1",
         "psr/container": "^1.0||^2.0",
         "psr/event-dispatcher": "^1.0"
     },
     "require-dev": {
         "fig/event-dispatcher-util": "^1.0",
         "friendsofphp/php-cs-fixer": "^2.17",
         "phpspec/prophecy-phpunit": "^2.0",
-        "phpstan/phpstan": "~0.12.0",
+        "phpstan/phpstan": "^1.0",
         "phpunit/phpunit": "^9.0.0",
         "zendframework/zend-coding-standard": "~1.0.0"
     },