gulp-shorthand 
shrthnd makes your CSS files lighter and more readable
Issues with the output should be reported on the shrthnd issue tracker.
Install
$ npm install --save gulp-shorthand
Usage
var gulp = require('gulp');
var shorthand = require('gulp-shorthand');
gulp.task('default', function () {
return gulp.src('src/index.css')
.pipe(shorthand())
.pipe(gulp.dest('dest'));
});License
MIT © Kevin Mårtensson