docs: add contributing link
docs: add contributing link
walmartlabs/grunt-bump,tischler/grunt-bump,eddiemonge/grunt-bump,aaccurso/grunt-bump-cordova,XciD/grunt-bump,vojtajina/grunt-bump,halkon/grunt-bump,legalthings/grunt-bump,dan-kushnaryov/grunt-bump,blargism/grunt-bump