Option to decode JSON date string

When sending Date objects, they are serialized into ISO string format, and JSON parse doesn't convert them back.

Propose to add option to JSON decode function, for example

const dateFormat = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/;

function dateReviver(key, value) {
    if (typeof value === "string" && dateFormat.test(value)) {
        return new Date(value);
    }
    
    return value;
}

module.exports.decode = function(str) {
     return JSON.parse(str, dateReviver)
}

Start at the JSON decode function described in the issue and inspect how the client currently parses incoming strings. Define and implement the requested opt-in date decoding behavior, then add or update coverage for ISO date strings and ordinary string values so the option's effect is clear.