Decap 3.1.0-beta.0

The main feature of this release is the upgrade to React 18. This is a large change with potential side effects, so we decided to release a beta version.

We kindly invite everyone to test, especially Gatsby users, who were most eagerly awaiting this update. If you find any new issues, please report them as GitHub Issues.

NPM: https://www.npmjs.com/package/decap-cms/v/3.1.0-beta.0

GitHub Pull Request: https://github.com/decaporg/decap-cms/pull/6941