Add the ability to configure the SameSite cookie option

🚀 Feature Proposal

On the latest Firefox releases, the following warning is issues (using via next-i18next).

From what I see, this option is not configurable (

i18next-http-middleware/lib/languageLookups/cookie.js

Lines 78 to 83 in 5a2ee9a

    
           const cookieOptions = { 
        
             expires: expirationDate, 
        
             domain: options.cookieDomain, 
        
             httpOnly: false, 
        
             overwrite: true 
        
           }

)

Is this something that could be added? https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite

Motivation

Prevent FF from breaking our website in a future release.

Example

{
  cookieSameSite: 'strict'
}

in the config.

I think this should not be too hard to implement, maybe I can submit a PR for that :)

PR are always welcome ;-)

btw: serializeCookie is already prepared for this: https://github.com/i18next/i18next-http-middleware/blob/master/lib/languageLookups/cookie.js#L34

adding: if (options.cookieSameSite) cookieOptions.sameSite = options.cookieSameSite here should do the trick: https://github.com/i18next/i18next-http-middleware/blob/master/lib/languageLookups/cookie.js#L85

and maybe an addition in the readme

	const cookieOptions = {
	expires: expirationDate,
	domain: options.cookieDomain,
	httpOnly: false,
	overwrite: true
	}