Node v20.11 logs an experimental warning about import assertions

[cinxmo]

After running yarn dev this warning appears:
ExperimentalWarning: Use importAttributes instead of importAssertions

[mbostock]

This warning is coming from tsx, so I don’t think we can do anything about it (other than suppressing the warning). Also, we can’t upgrade tsx because of privatenumber/tsx#433, so we are stuck on 4.2.1. Overall, it seems like tsx is causing lots of problems in terms of our distribution, so I think we should consider compiling to JavaScript on publish to remove the runtime dependency on tsx.