Make configuration name argument required in RodauthMailer

This avoids Rubocop complaints. It's unlikely that people will test
the mailer directly anyway, so there is little benefit in making the
argument optional.

lib/generators/rodauth/templates/app/mailers/rodauth_mailer.rb

@@ -1,40 +1,40 @@
 class RodauthMailer < ApplicationMailer
-  def verify_account(name = nil, account_id, key)
+  def verify_account(name, account_id, key)
     @email_link = email_link(name, :verify_account, account_id, key)
     @account = find_account(name, account_id)
 
     mail to: @account.email, subject: rodauth(name).verify_account_email_subject
   end
 
-  def reset_password(name = nil, account_id, key)
+  def reset_password(name, account_id, key)
     @email_link = email_link(name, :reset_password, account_id, key)
     @account = find_account(name, account_id)
 
     mail to: @account.email, subject: rodauth(name).reset_password_email_subject
   end
 
-  def verify_login_change(name = nil, account_id, key)
+  def verify_login_change(name, account_id, key)
     @email_link = email_link(name, :verify_login_change, account_id, key)
     @account = find_account(name, account_id)
     @new_email = @account.login_change_key.login
 
     mail to: @new_email, subject: rodauth(name).verify_login_change_email_subject
   end
 
-  def password_changed(name = nil, account_id)
+  def password_changed(name, account_id)
     @account = find_account(name, account_id)
 
     mail to: @account.email, subject: rodauth(name).password_changed_email_subject
   end
 
-  # def email_auth(name = nil, account_id, key)
+  # def email_auth(name, account_id, key)
   #   @email_link = email_link(name, :email_auth, account_id, key)
   #   @account = find_account(name, account_id)
 
   #   mail to: @account.email, subject: rodauth(name).email_auth_email_subject
   # end
 
-  # def unlock_account(name = nil, account_id, key)
+  # def unlock_account(name, account_id, key)
   #   @email_link = email_link(name, :unlock_account, account_id, key)
   #   @account = find_account(name, account_id)