Update js-yaml to current version
Update js-yaml to current version

We got a notification from Github that our version of js-yaml has a security vulnerability. This just bumps it up to the current (fixed) version.

openlibrary/bookreader,internetarchive/bookreader,openlibrary/bookreader,openlibrary/bookreader,openlibrary/bookreader,internetarchive/bookreader,openlibrary/bookreader