I was referencing the with-passport example and found a minor syntax error:\
The login and signup page both used `event.preventDefault()` on the submit handlers, whereby the correct reference to the event is `e` as defined within the `handleSubmit` functions.
Additionally used the chance to bump npm packages, the largest bump being swr to the latest version: 0.3.0
### Summary of all Changes made:
* Fixed syntax error on login page
* Fixed syntax error on signup page
* Bumped cookie to 0.4.1
* Bumped next-connect to 0.8.1
* Bumped swr to 0.3.0
* Fix incorrect link in with-passport example
Closes#11961
* hardcode link for with-passport README
* fix link
Co-Authored-By: Luis Alvarez D. <luis@zeit.co>
Co-authored-by: Luis Alvarez D. <luis@zeit.co>
