Adjust psr7 version constraints

Author: GrahamCampbell

composer.json

@@ -19,15 +19,15 @@
         "phpunit/phpunit": "^9.6.17 || ^10.0 || ^11.0 || ^12.0",
         "php-http/message": "^1.0 || ^2.0",
         "php-http/message-factory": "^1.0",
-        "guzzlehttp/psr7": "^1.9 || ^2.0",
+        "guzzlehttp/psr7": "^1.9 || ^2.0 || ^3.0",
         "th3n3rd/cartesian-product": "^0.3"
     },
     "suggest": {
         "php-http/httplug": "To test async client"
     },
     "require-dev": {
         "php-http/httplug": "^2.0",
-        "nyholm/psr7": "^1.8@dev"
+        "nyholm/psr7": "^1.8.2"
     },
     "autoload": {
         "psr-4": {