Update checkpoints
Update checkpoints

Blocks 337000, 338000, 339000 for `mainnet` and block 318000 for `testnet`

monaparty/counterparty-lib,tokenly/counterparty-lib,gotcha/testcounter,monaparty/counterparty-lib,stefcrypto/counterparty-lib,CounterpartyXCP/counterparty-lib,jarymoth/counterpartyd,F483/counterparty-lib,CounterpartyXCP/counterparty-lib,F483/counterparty-lib,coinwarp/dogeparty-lib