Support Laravel 5.8

Author: m1guelpf

composer.json

@@ -26,9 +26,9 @@
     "require": {
         "php": "^7.0",
         "ext-json": "*",
-        "illuminate/database": "5.5.*|5.6.*|5.7.*",
-        "illuminate/contracts": "5.5.*|5.6.*|5.7.*",
-        "illuminate/support": "5.5.*|5.6.*|5.7.*",
+        "illuminate/database": "5.5.*|5.6.*|5.7.*|5.8.*",
+        "illuminate/contracts": "5.5.*|5.6.*|5.7.*|5.8.*",
+        "illuminate/support": "5.5.*|5.6.*|5.7.*|5.8.*",
         "nesbot/carbon": "^1.22"
     },
     "require-dev": {