use latest lts version of node

[camallen]

why node is locked to minor version is strange...this leaves the system out of date. Perhaps there is a good reason for this... aha short term solution to get the builds running again #6154

This PR keeps the node major version but allows latest minor and patch versions to be tested against, https://github.com/actions/setup-node#supported-version-syntax

This will need to by synced with the deploy configs as well https://github.com/zooniverse/Panoptes-Front-End/search?q=node_version

looks like the deprecated modal-form is blocking the react bump to v17+ https://github.com/zooniverse/modal-form/blob/635652c42e797abc1c5843f5fcce98f646027505/package.json#L6

TBH - it's strange that this even works in node 16.3.x as the dependencies are borked...i assume an npm bug

Staging branch URL: https://pr-{NUMBER}.pfe-preview.zooniverse.org

Required Manual Testing

• Does the non-logged in home page render correctly?
• Does the logged in home page render correctly?
• Does the projects page render correctly?
• Can you load project home pages?
• Can you load the classification page?
• Can you submit a classification?
• Does talk load correctly?
• Can you post a talk comment?

Review Checklist

• Does it work in all major browsers: Firefox, Chrome, Edge, Safari?
• Does it work on mobile?
• Can you npm ci and app works as expected?
• If the component is in coffeescript, is it converted to ES6? Is it free of eslint errors? Is the conversion its own commit?
• Are the tests passing locally and on GitHub Actions?

Optional

• Have you replaced any ChangeListener or PromiseRenderer components with code that updates component state?
• If changes are made to the classifier, does the dev classifier still work?
• Have you resized and compressed any image you've added?
• Have you added in flow type annotations?
• Have you followed the Springer guidelines for commit messages?

[coveralls]

Coverage remained the same at 50.209% when pulling cad686b on bump-ci-to-lts-node into 07d7488 on master.

[eatyourgreens]

This is building and deploying without problems after editing .npmrc.