v2.1.0 - solidity 0.6

Node version: 2.4.1
Update pre-deploy-contracts address.

export const NFT: "0x0000000000000000000000000000000000000801";
export const EVM: "0x0000000000000000000000000000000000000802";
export const Oracle: "0x0000000000000000000000000000000000000803";
export const Schedule: "0x0000000000000000000000000000000000000804";
export const DEX: "0x0000000000000000000000000000000000000805";