Add support for Laravel 5.8

Author: pactode

composer.json

@@ -12,8 +12,8 @@
     ],
     "require": {
         "php": "^7.1",
-        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0",
-        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0"
+        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0|~5.8.0",
+        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|~5.8.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.1|^7.0",