test whether a require string is relative
npm install relative-require-regex
A regex to test whether a require string is a system path (relative or absolute). Module lookups like "url" will return false.
``js
var relative = require('relative-require-regex')()
relative.test('url') => false
relative.test('is-array') => false
relative.test('xtend/mutable') => false
relative.test('./foo') => true
relative.test('../foo') => true
relative.test('/home/index.js') => true
`
#### reg = relative()`
Returns a new regex that tests whether the require path is relative or not, according to Node's resolve algorithm.
MIT, see LICENSE.md for details.