Rails 6 adds Purpose Metadata to Cookies

Rails 6 adds purpose metadata to cookies to prevent attackers from copying the value of one cookie and use it for another.

Rails 6 removes Action View helper image_alt

Rails 6 removes the deprecated `image_alt` helper from Action View.

Rails 6 sms link helper

Rails 6.1.0 adds support for sms_to helper, which renders SMS anchor link tag, which when clicked pops open user's SMS client targetting the specified phone number.