fs.copyFileSync does not work for resources bundled in binaries

To recreate

1. Create a bundle and add a resource (e.g., ‘my-file’)
2. In the binary, try to read and/or copy the resource to the external file system

What should happen

fs.readFileSync and fs.copyFileSync should both work.

What actually happens

Only fs.readFileSync works.

Example

This works:

const myFile = path.join(__dirname, 'my-file')
const contents = fs.readFileSync(myFile)

This doesn’t work:

const myFile = path.join(__dirname, 'my-file')
fs.copyFileSync(myFile, someExternalDirectory)

Note: This issue follows on from #605

[calebboyd]

https://github.com/nexe/nexe/releases/tag/v3.2.0

[TemaSM]

@paulocoghi, @calebboyd tested both these functions in production from current master branch, works fine as expected 👍