Merge pull request #257 from slimphp/dependabot/composer/phpstan/phps…

…tan-tw-1.4.6

Update phpstan/phpstan requirement from ^1.4.4 to ^1.4.6

composer.json

@@ -27,7 +27,7 @@
     "require-dev": {
         "phpunit/phpunit": "^9.5",
         "phpspec/prophecy-phpunit": "^2.0",
-        "phpstan/phpstan": "^1.4.4",
+        "phpstan/phpstan": "^1.4.6",
         "psr/http-factory": "^1.0",
         "squizlabs/php_codesniffer": "^3.6"
     },