Results 14 issues of Genysys

Fixed breaking changes to validator set contracts. Left old folder as most people are still on 0.4.*

SEE: https://nvd.nist.gov/vuln/detail/CVE-2020-28498

I am trying to run this via a truffle box but unsuccessful so far. ## Specifications OS: MacOS Mojave Truffle v5.0.19 (core: 5.0.19) Solidity v0.5.0 (solc-js) Node v10.15.3 Web3.js v1.0.0-beta.37...

bug
help wanted

This PR adds the correct link to the DevPost article