BigIntSupport
BigIntSupport extends dayjs(), dayjs.unix APIs to support BigInt argument.
var bigIntSupport = require("dayjs/plugin/bigIntSupport");
// import bigIntSupport from 'dayjs/plugin/bigIntSupport' // ES 2015
dayjs.extend(bigIntSupport);
dayjs(BigInt(1666310421101));
dayjs.unix(BigInt(1666311003));