Support php ^8.0

closes #74

Author: nunomazer

composer.json

@@ -20,7 +20,7 @@
         "wiki": "https://github.com/uepg/laravel-sybase/wiki"
     },
     "require": {
-        "php": "^5.6.4 || ^7.0",
+        "php": "^5.6.4 || ^7.0 || ^8.0",
         "doctrine/dbal": "^2.5",
         "illuminate/database": "5.4.*|5.5.*|5.6.*|5.7.*|5.8.*|6.*|7.*|8.*",
         "illuminate/support": "5.4.*|5.5.*|5.6.*|5.7.*|5.8.*|6.*|7.*|8.*"