Hi! In case you didn’t know, Gatsby is planning its next major version for Q4 of this year! In preparation, the Gatsby team is reaching out to maintainers for our most popular Starters to help make the upgrade to Gatsby 4 as smooth as possible.

This PR updates your Gatsby Starter to the beta version of this next release, as well as some related plugins. It’s just in draft form for now, since the 4.0.0 version of Gatsby isn’t quite ready for general release yet. We’re mainly testing updating Gatsby and the other official plugins to ensure that the Starter builds without errors.

Note: Gatsby 4 requires Node v14 or higher. This is a change from Gatsby 3, which worked with Node v12.13 or newer.
Once version 4.0.0 is ready, we'll come back to update the dependencies and convert this draft to a PR for review. Until then, no action is required on your end. If you have any questions / concerns, let us know in the comments.

Thanks again for all your work as a Gatsby maintainer. We’re so grateful to have you as part of our community. 💜

For more information on what’s coming with Gatsby v4, check out the [GitHub Discussion](https://github.com/gatsbyjs/gatsby/discussions/32860](https://github.com/gatsbyjs/gatsby/discussions/32860).

Changes:

• updated package.json dependencies to g4-beta tags
• changed react syntax to preferred syntax