Update to Vue3

[NatHillardUSDR]

Background

Our app currently uses Vue2, which is behind the latest release, Vue3 -- Vue3 became the default on February 7, 2022.

According to https://v2.vuejs.org/lts/ , Vue2 will be end-of-life'd by the end of 2023. At that time, while still available, it will no longer receive updates, including security and browser compatibility fixes.

Vue3 is a non-trivial upgrade that will require some degree of rewriting -- see more here.

An even bigger problem is that many libraries that we rely on, e.g. Vue-Formulate, either don't support vue3 out of the box or have substantially different implementations / interfaces for their vue3 variants (this latter is the case with Vue-Formulate, which has an entirely different Vue3 variant called FormKit). Some libraries are old and have not been updated to support vue3 - we may need to consider finding alternatives to these.

We should do an audit of this and its potential impact.

Prior Work

There was a previous issue about migrating to Vue 3 here: #45 , and even a patch around this, but work on this was deprioritized at the time.

Potential Next Steps

• We should audit potential impact of a vue3 upgrade on our libraries
• There's a build of vue3 that includes support for vue2, called the Migration Build that we may be able to drop in to help us as an interim solution; we can then write new components in Vue3 while needing to minimally change existing files. It might be worth trying this out?