Update dependencies

Author: Sephster

composer.json

@@ -13,10 +13,10 @@
         "ext-json": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.4.3 || ^9.0",
-        "laminas/laminas-diactoros": "^2.1.2",
-        "phpstan/phpstan": "^0.11.8",
-        "phpstan/phpstan-phpunit": "^0.11.2",
+        "phpunit/phpunit": "^8.5.4 || ^9.1.3",
+        "laminas/laminas-diactoros": "^2.3.0",
+        "phpstan/phpstan": "^0.12.19",
+        "phpstan/phpstan-phpunit": "^0.12.8",
         "roave/security-advisories": "dev-master"
     },
     "repositories": [