* refactor: add an eventListener for click
* chore: oops
* feat: add expiry for the cookie 5 days from now
* chore: update comment
* chore: add strict back
* feat: set up an event handler that will allow close the banner and set a cookie when you've closed it
* feat: return early if the cookie says it shouldn't be shown
* refactor: make the names more general so that they can be applied to other campaigns