this package has been moved to https://github.com/zkochan/packages/tree/master/preferred-pm
preferred-pm
Returns the preferred package manager of a project
Installation
npm i preferred-pm
Usage
'use strict'
const preferredPM = require('preferred-pm')
preferredPM(process.cwd())
.then(pm => console.log(pm))
//> {name: "npm", version: ">=5"}