Update composer.json for Guzzle 7 and PHP 8.1+ compatibility

Co-authored-by: Subterrane <5290140+Subterrane@users.noreply.github.com>

Author: Copilot

composer.json

@@ -4,9 +4,9 @@
     "version": "1.7.0",
     "minimum-stability": "dev",
     "require": {
-        "php": ">=5.5",
-        "guzzlehttp/guzzle": "^5.3.1|^6.2|7.0",
-        "guzzlehttp/psr7": "^1.4.1"
+        "php": ">=8.1",
+        "guzzlehttp/guzzle": "^5.3.1|^6.2|^7.0",
+        "guzzlehttp/psr7": "^1.4.1|^2.0"
     },
     "suggest": {
          "ext-json": "*",