Completely on Typescript

Convert App to typescript (#9)

* WIP on converting the app file to typescript

* finishing the conversion to typescript

Adding underlines query parameter support

This addition allows for underlines=true or underlines=false as query parameters.

Version 1.1 - Removal of react-query-params

The major change in this release was removing the use of react-query-params, which is now no longer maintained. I converted the main App component to be a functional component, with hooks, instead.