Bumped min versions

Author: GrahamCampbell

composer.json

@@ -26,9 +26,9 @@
     ],
     "require": {
         "php": "^7.2.5 || ^8.0",
-        "guzzlehttp/guzzle": "^7.4.1",
-        "guzzlehttp/promises": "^1.5.1",
-        "guzzlehttp/psr7": "^1.8.3 || ^2.1"
+        "guzzlehttp/guzzle": "^7.5.1",
+        "guzzlehttp/promises": "^1.5.2",
+        "guzzlehttp/psr7": "^1.9.1 || ^2.4.5"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.5.19"