TypeError: api.cancel is not a function

[victorfds]

How to use cancel functionality with binary-live-api?

async function main() {
    const api = new LiveApi({ ...options });
    try {
       const proposal = await api.subscribeToPriceForContractProposal({ ...proposalObj });
       const buy = await api.buyContract(proposal.proposal.id, proposal.proposal.spot);
       await api.cancel(buy.proposal_open_contract.contract_id);
    }
    catch(error) {
      console.log(error); // TypeError: api.cancel is not a function
    }
}

main();