Given an entry file and a target file, track down any files that are requiring the target file
npm install backtrack-requireGiven an entry file and a target file, track down any files that are requiring the target file.

``
Usage: backtrack-require
Find every file that is requiring target, given anentry file.`
For example:
` bash`
$ backtrack-require fixtures/a.js fixtures/c.js
fixtures/b.js
fixtures/d.js
Given an entry and a target file, call the done callback with an arraytarget`.
of files that are requiring
MIT. See LICENSE.md for details.