Upgrade Typescript plugin to work with latest release

I would like to use https://github.com/p-try/fullcalendar-yearview which is a plugin for fullcalendar.io However, the project is not presently working with the 5.x (current) release of Full Calendar. I would like the project forked, upgraded to work with 5.x and hopefully eventually we can coordinate a pull request to merge the work back into the upstream project.

Deliverables
The code of https://github.com/p-try/fullcalendar-yearview upgraded to work with the latest released version of fullcalendar.io