Update composer.json

这个扩展在laravel里是require-dev，生产环境里不安装不能正常安装扩展

composer.json

@@ -14,7 +14,8 @@
     "require": {
         "php": ">=7.1.0",
         "laravel/framework": "~5.5|~6.0|~7.0|~8.0",
-        "spatie/eloquent-sortable": "3.*|4.*"
+        "spatie/eloquent-sortable": "3.*|4.*",
+        "doctrine/dbal": "^2.6|^3.0"
     },
     "require-dev": {
         "laravel/dusk": "~5.9|~6",