Allow periods in cookie name

[moberegger]

Description

Similar to #330, this PR relaxes the validation on the cookie name by allowing .s. As per https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie#attributes, this should be allowed.

I stumbled into this issue migrating over from express-session, which uses connect.sid as the default cookie name. I saw that #330 relaxed this to allow for -, so figured I'd do the same for ..

References

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie#attributes

Testing

Added a new my.session value to test against in the test setup provided by #330.

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not master

[adamjmcgrath]

Thanks @moberegger!