Update composer.json for support Laravel 8 (#48)

Author: arefeh-rj

composer.json

@@ -21,7 +21,7 @@
     },
     "minimum-stability": "dev",
     "require": {
-        "illuminate/database": "^7.0||^6.0||4.1 - 6.0"
+        "illuminate/database": "^8.0||^7.0||^6.0||4.1 - 6.0"
     },
     "suggest": {
         "jenssegers/mongodb": "Use QueryBuilderParser with MongoDB"