Update composer.json

Support Laravel 6.*

Author: robindrost

composer.json

@@ -12,7 +12,7 @@
   "require": {
     "php": "^7.1",
     "prismic/php-sdk": "5.1.0",
-    "illuminate/support": "^5.5"
+    "illuminate/support": "^5.5|^6.0"
   },
   "require-dev": {
     "phpunit/phpunit": "~7.0",
@@ -36,4 +36,4 @@
       ]
     }
   }
-}
+}