path.relative() result changed in v5.7.0

[4kochi]

• Version: v5.7.0
• Platform: Darwin pitti.local 15.3.0 Darwin Kernel Version 15.3.0: Thu Dec 10 18:40:58 PST 2015; root:xnu-3248.30.4~1/RELEASE_X86_64 x86_64
• Subsystem: path

Here is the output:

pitti:~ master$ node -v
v5.6.0
pitti:~ master$ node
> path.relative('/Users/a/web/b/test/mails', '/Users/a/web/b')
'../..'
> 
(To exit, press ^C again or type .exit)
> 
pitti:~ master$ node -v
v5.7.0
pitti:~ master$ node
> path.relative('/Users/a/web/b/test/mails', '/Users/a/web/b')
'../../../b'
> 

[evanlucas]

/cc @mscdex

[m99coder]

Related gruntjs/grunt-contrib-clean#85