Add Laravel 7 support

Author: miracuthbert

composer.json

@@ -16,10 +16,10 @@
     ],
     "require": {
         "php": "^7.1.3",
-        "illuminate/console": "5.8.*|^6.0",
-        "illuminate/database": "5.8.*|^6.0",
-        "illuminate/http": "5.8.*|^6.0",
-        "illuminate/support": "5.8.*|^6.0"
+        "illuminate/console": "^6.0|^7.0",
+        "illuminate/database": "^6.0|^7.0",
+        "illuminate/http": "^6.0|^7.0",
+        "illuminate/support": "^6.0|^7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.0",