bump version to 2.1.1
bump version to 2.1.1


Former-commit-id: 9041a677f71bbd8176e507d2b26a19e5e6e15afc
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin