when install from node_modules, "name"/"dependencies" in package.json should not be used

[GongT]

reproduce steps:

1. install in a empty dir:
   corepack npm install --save react@npm:preact jspm
2. run jspm:
   jspm "install" "--provider" "nodemodules" "react"

result:

Error: file:///tmp/qqq/node_modules/preact does not exist, try installing "preact" with npm first via "npm install preact".

source:

https://github.com/jspm/generator/blob/11475a5f47e18a72b38f1860c110dd7fe4d12ef4/src/install/package.ts#L219C13-L219C13

detail:

The new jspm do not download anything to local filesystem, version (or url) of a package doesn't seem to make sense.

I also see some code (many come from 2 years ago) is reading "name" field in package.json, I think they are "happens to be ok".

[guybedford]

This is because JSPM generator does not respect the "react" alias when doing an install from the nodemodules provider.

If you instead fo jspm install --provider nodemodules react=preact it will work correctly in this case I believe.