Update index.js

[MorielHarush]

Hey , This pull request is to fix a security vulnerability which allows Remote Code Execution
CWE-502: Deserialization of Untrusted Data
PoC to test the vulnerability :

const Replicator = require('replicator');
const replicator = new Replicator();

replicator.decode('[{"@t":"[[Error]]","data":{"name":"Function","message":"require(\'child_process\').exec(\'open -a Calculator\')"}}]')();

[MorielHarush]

@inikulin Any concerns ?