gulp.task('sass', function () {
return sass('app/scss', {sourcemap: true})
.on('error', function (err) {
console.error('Error!', err.message);
})
.pipe(sourcemaps.write('./', {
includeContent: false,
sourceRoot: '/app/scss'
}))
.pipe(
browserSync.stream({match: '**/*.css'}));
});