Date parameters are quoted

[KG3RK3N]

Description
Currently, dates can only send as quoted string. That makes it complicated on the backend site, because this values must cleaned from quotes to use it as dates.

My solution
Add the below code to the quoteValue method.

if (value instanceof Date) { return `${value.toJSON()}`; }

Additional context
If there is nothing that against it, I would like to create a PR.