fix(package): update uuid to version 8.1.0

Closes #114

Author: greenkeeper[bot]

package.json

@@ -40,6 +40,6 @@
     "jsonwebtoken": "^8.4.0",
     "pg": "^7.6.1",
     "sequelize": "^4.41.2",
-    "uuid": "^3.3.2"
+    "uuid": "^8.1.0"
   }
 }