Allow Laravel 7 installs

Author: driesvints

composer.json

@@ -11,9 +11,9 @@
     ],
     "require": {
         "php": "^7.1.3",
-        "illuminate/console": "~5.8|^6.0",
-        "illuminate/filesystem": "~5.8|^6.0",
-        "illuminate/support": "~5.8|^6.0"
+        "illuminate/console": "~5.8|^6.0|^7.0",
+        "illuminate/filesystem": "~5.8|^6.0|^7.0",
+        "illuminate/support": "~5.8|^6.0|^7.0"
     },
     "require-dev": {
         "mockery/mockery": "^1.0",