Avoid "Uncaught ReferenceError: Drupal is not defined" for anonymous users.

Problem/Motivation

For Anonymous users that visits a page with fullPage.js this one doesn't work for known js error "Uncaught ReferenceError: Drupal is not defined". This error happens whenever there's a module that use, in its libraries, Drupal without requiring the core/drupal library dependency.

Steps to reproduce

1. Enable fullPage.js for specific content type.
2. Create a node of the type of content type just created.
3. Visit the node using an anonymous session.
4. Check the browser's console.

Proposed resolution

Add the - core/drupal dependency to the file.

Remaining tasks

None.

User interface changes

None.

API changes

None.

Data model changes

None.