One of Esbuild's Design principles is to Maximize parallelism
https://github.com/evanw/esbuild/blob/main/docs/architecture.md#design-principles
Which is great, and typically carries over into how people are writing esbuild plugins.
However when you use tsup and with build for multiple formats ['cjs', 'esm']: tsbuild runs the same esbuild-plugin, twice in parrallell.
I suspect esbuild-plugin developers don't image that happening, since they are developing for esbuild and not tsup.
I've run into a problem, because two copies of the same esbuild-plugin are writing to the same file, leading to a corrupt file:
jfortunato/esbuild-plugin-manifest#14
Perhaps there should be a generic solution in tsup to prevent this from happening?
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