Added relative path to _mocha, in the exec:coveralls target.
Added relative path to _mocha, in the exec:coveralls target.

KnightWind/scraperjs,nkchouhan/scraperjs,nkchouhan/scraperjs,richard512/scraperjs,Denniskevin/scraperjs,hitesh97/scraperjs,Nishi-Inc/scraperjs,expertmaksud/scraperjs,jay3126/scraperjs,hitesh97/scraperjs,richard512/scraperjs,chmac/scraperjs,chmac/scraperjs,expertmaksud/scraperjs,KnightWind/scraperjs,ruipgil/scraperjs,Denniskevin/scraperjs,ruipgil/scraperjs,Nishi-Inc/scraperjs,jay3126/scraperjs