Add HTTPOnly and SameSite attribute to Cookie

[gjyalpha]

The Cookie struct does not accommodate HTTPOnly and SameSite fields, described in the spec.

This makes it impossible to specify the HTTPOnly and SameSite field of a cookie. This field can be specified in the Set-Cookie HTTP header, so the Cookie struct should also support it.

[gjyalpha]

A similar issue filed for Selenium WebDriver SeleniumHQ/selenium#7798

[nveeser]

What all needs to be done here?
Can we just update the Cookie struct to contain an extra field with the correct JSON field name?

[gjyalpha]

Yes, I believe we just need to update the Cookie struct.