Proposal 15: Upgrade LikeCoin chain mainnet to FoTan

This proposal is proposing for upgrading the LikeCoin chain mainnet software from sheungwan to fotan. Details:

- target software version: fotan

- version code: fotan-1

- repo: https://github.com/likecoin/likecoin-chain/tree/fotan-1

- Docker image: "likecoin/likecoin-chain:fotan-1"

- commit hash: 32056fc4759d276a11180256474cc4ed5e3ed8d4

- halt time: 2021-08-18 20:00:00 +8 (1629288000 in Unix timestamp)

- parameters for genesis migration:

- iscn-registry-name: "likecoin-chain"

- iscn-fee-per-byte: "2000.000000000000000000nanolike"

- chain-id: "likecoin-mainnet-2"

Right before the halt time, validators shall join into a realtime conference for preparing the upgrade and discussing issues during the upgrade.