Fix dependency for dev

Author: noglitchyo

composer.json

@@ -5,14 +5,13 @@
     "require": {
         "php": ">=7.3",
         "psr/http-server-middleware": "^1.0",
-        "psr/http-message": "^1.0",
-        "nyholm/psr7-server": "^0.3.0",
-        "nyholm/psr7": "^1.1"
+        "psr/http-message": "^1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.1",
         "squizlabs/php_codesniffer": "*",
-        "phpstan/phpstan": "^0.11.8"
+        "phpstan/phpstan": "^0.11.8",
+        "nyholm/psr7": "^1.1"
     },
     "license": "MIT",
     "authors": [