Allow guzzle version 6 support

Author: andrewdrake

composer.json

@@ -37,7 +37,7 @@
         "php": "^7.3|^7.4|^8.0",
         "cknow/laravel-money": "^4.0|^5.0|^6.0|^7.0",
         "doctrine/dbal": "^2.0|^3.0",
-        "guzzlehttp/guzzle": "^7.3",
+        "guzzlehttp/guzzle": "^6.0|^7.0",
         "illuminate/support": "^6.0|^7.0|^8.0|^9.0",
         "kyslik/column-sortable": "^6.4",
         "lab404/laravel-auth-checker": "^1.6",