Allow all versions of laravel 6

Author: jimmypuckett

composer.json

@@ -21,8 +21,8 @@
     ],
     "require": {
         "php": ">=7.2",
-        "illuminate/contracts": "5.5.*|5.6.*|5.7.*|5.8.*|6.0.*",
-        "illuminate/support": "5.5.*|5.6.*|5.7.*|5.8.*|6.0.*",
+        "illuminate/contracts": "~5.5|~6",
+        "illuminate/support": "~5.5|~6",
         "phayes/geophp": "~1.2"
     },
     "require-dev": {