Add url_options param to sign_in email (#208)

app/mailers/passwordless/mailer.rb

@@ -10,14 +10,15 @@ class Mailer < Passwordless.config.parent_mailer.constantize
     # @param session [Session] An instance of Passwordless::Session
     # @param token [String] The token in plaintext. Falls back to `session.token` hoping it
     # is still in memory (optional)
-    def sign_in(session, token = nil)
+    def sign_in(session, token = nil, url_options = {})
       @token = token || session.token
 
       @magic_link = Passwordless.context.url_for(
         session,
         action: "confirm",
         id: session.to_param,
         token: @token,
+        **url_options,
         **default_url_options
       )