updated node version for tests
updated node version for tests

vigetlabs/gulp-starter,vigetlabs/gulp-starter,jakefleming/mezzotent,greypants/gulp-starter,greypants/gulp-starter,greypants/gulp-starter,vigetlabs/gulp-starter,jakefleming/mezzotent,jakefleming/mezzotent,greypants/gulp-starter,jakefleming/mezzotent,vigetlabs/gulp-starter