Does not understand "files" starting with /; thinks files will be omitted

[cspotcode]

Description

np erroneously warns that files will be omitted from the published package when package.json "files" entries start with /

Steps to reproduce

It reproduced when publishing https://github.com/cspotcode/tsimportlib

The package.json looks like this:

"files": [
  "/index.d.ts",
  "/index.js"
]

The logged warning:

? The following new files will not be part of your published package:
- index.d.ts
- index.js
Continue? Yes

The files were, indeed, published. https://unpkg.com/browse/[email protected]/

Expected behavior

np understands that files entries starting with a / indicate paths relative to the root of the package, and those files will be included.

Environment

np - 7.5.0
Node.js - 16.2.0
npm - 7.14.0
Git - 2.29.2
OS - Ubuntu 20.04.1 LTS (within WSL2 on Windows 10)

[rootwork]

I ran into this identical behavior; the items in my files were directories like /lib.

I thought I just wasn't understanding the files attribute somehow and was pulling my hair out until I chanced a publish and realized these items were in fact being included.