* Refactor js-binding to support bundling single-package artifacts
The existsSync check breaks the bundlers I've tested (esbuild, webpack,
ncc), so you cannot bundle napi-rs packages that have all binarys in a
single package.
I've tested this change with both single package and multi package
libraries.
* Update snapshots
* Update CI
* Fix electron test
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Co-authored-by: Caleb ツ Everett <calebev@amazon.com>
Co-authored-by: LongYinan <lynweklm@gmail.com>
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