Changes for new jsx runtime and bump major version

[ashharrison90]

prereq for grafana/grafana#88802

won't merge and release until we're all ready in core as well 👍

[jackw]

won't merge and release until we're all ready in core as well 👍

This package is also used by plugins. If a plugin dev updates this will they need to update their eslint config and webpack config too?

[ashharrison90]

won't merge and release until we're all ready in core as well 👍

This package is also used by plugins. If a plugin dev updates this will they need to update their eslint config and webpack config too?

yes. do plugins typically manage their own dependencies, or do they rely on create-plugin to update them? or some mixture of both? 🤔

either way, we should probably add a CHANGELOG to this repo to explain the changes. it will be something like:

• update eslint-config-grafana as well
• update the build to use new jsx runtime (this step will vary depending on the existing build, e.g. babel, esbuild, etc.)
• run the react codemod on the plugin code

[tolzhabayev]

We should have a concrete plan first on how and especially when we want to tackle the upgrade, so let's have it in place before we make plugin developers do something we don't really know what exactly it is.