This plugin bundles the following third-party libraries in public/js/scholabook-portal.js:

1. Preact (https://preactjs.com/)
   License: MIT
   Copyright (c) 2015-present Jason Miller

2. HTM (https://github.com/developit/htm)
   License: Apache License 2.0
   Copyright (c) 2018 Jason Miller

3. Preact Router (https://github.com/preactjs/preact-router)
   License: MIT
   Copyright (c) 2015-present Jason Miller

All three are compatible with the GNU General Public License v2 or later.