Use the new JSX tranform

[jonkoops]

The React team announced a new way to transform JSX, which yields a couple of benefits:

• With the new transform, you can use JSX without importing React.
• Depending on your setup, its compiled output may slightly improve the bundle size.
• It will enable future improvements that reduce the number of concepts you need to learn React.
• There are some performance improvements and simplifications that React.createElement does not allow.

This will also be required for future versions of React that will ship with the ECMAScript module syntax:

In addition to cleaning up unused imports, this will also help you prepare for a future major version of React (not React 17) which will support ES Modules and not have a default export.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[jonkoops]

Bump