Update Devise to 4.7.1

Devise Gem for Ruby confirmation token validation with a blank string

Devise before 4.7.1 confirms accounts upon receiving a request with a blank confirmation_token, if a database record has a blank value in the confirmation_token column.

However, there is no scenario within Devise itself in which such database records would exist.

Patched versions: >= 4.7.1
Unaffected versions: none

Testing

Make sure you can log in with your current account and that you can create and activate a new one.