chore: update guzzlehttp/guzzle & illuminate/support (#92)

Author: repat

composer.json

@@ -10,8 +10,8 @@
     }],
     "require": {
         "php": "^7.2",
-        "guzzlehttp/guzzle": "^6.5",
-        "illuminate/support": "^6.0|^7.0"
+        "guzzlehttp/guzzle": "^6.5|^7.0",
+        "illuminate/support": "^6.0|^7.0|^8.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.16",