security: require league/flysystem^2 to detect directory traversal

Author: streamtw

composer.json

@@ -31,7 +31,8 @@
     "illuminate/filesystem": "5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.* || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0",
     "illuminate/support": "5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.* || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0",
     "illuminate/http": "5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.* || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0",
-    "illuminate/container": "5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.* || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0"
+    "illuminate/container": "5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.* || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0",
+    "league/flysystem": "^2.0.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^6.2",