Update LowDB dependency

Author: typicode

package.json

@@ -14,7 +14,7 @@
     "errorhandler": "^1.2.0",
     "express": "^4.9.5",
     "got": "^1.2.2",
-    "lowdb": "^0.4.2",
+    "lowdb": "^0.5.1",
     "method-override": "^2.1.2",
     "morgan": "^1.3.1",
     "serve-static": "^1.6.1",