Upgrade to vite@2.8+ with the new worker mode

[amoutonbrady]

Vite recently made a new release which handles workers import differently.

https://github.com/vitejs/vite/blob/main/packages/vite/CHANGELOG.md#workers-using-standard-syntax

I'd like to migrate to it so that we don't fall behind too much with direct dependency.

[amoutonbrady]

Work on this has started over here: #88

Feel free to join if you want to help :)