Updated to support Illuminate version 6 & 7 (#15)

* database 7 compatibility

* upgrade for mime

Author: th0rn0

composer.json

@@ -5,9 +5,9 @@
     "require": {
         "php": "^7.1.3",
         "illuminate/support": "^5.8|^6.0|^7.0",
-        "illuminate/database": "^5.8",
-        "symfony/http-foundation": "^4.3.8",
-        "symfony/mime": "^4.3.8"
+        "illuminate/database": "^5.8|^6.0|^7.0",
+        "symfony/http-foundation": "^4.3.8|^5",
+        "symfony/mime": "^4.3.8|^5"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.5|^8.0",