Chore/react deprecation warnings

[catarak]

Fixes #2021

Changes: Removes many of the React deprecation warnings. The rest of the warnings can be removed when upgrading to React 18.

I have verified that this pull request:

• [x] has no linting errors (npm run lint)
• [x] has no test errors (npm run test)
• [x] is from a uniquely-named feature branch and is up to date with the develop branch.
• [x] is descriptively named and links to an issue number, i.e. Fixes #123

[release-com[bot]]

Release Environments

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• p5.js-web-editor
  • app-ted3110-p5-js-web-editor.rls.sh
  • preview-ted3110-p5-js-web-editor.rls.sh

:wrench:Environment Status : https://app.releasehub.com/public/Processing%20Foundation/env-c4a0807a28

[raclim]

I upgraded react-helmet to its latest version, v6.1.0, and react-tabs to 3.2.3, which is the latest one compatible with our current version of React. I think https://github.com/processing/p5.js-web-editor/pull/2218 can address the remaining warnings for now.

[lindapaiste]

I upgraded react-helmet to its latest version, v6.1.0

Did that actually fix the warnings? My understanding is that react-helmet is dead and we need to switch to react-helmet-async.

[raclim]

Some of these changes have fallen out of date, so I'm going to close this for now!