####homepage ####github : https://github.com/qq4647805/gulp-yspng
var yspng = require('gulp-yspng');
gulp.task('yspng', function() {
gulp.src(["images/**/*.png"])
.pipe(yspng({
speed: 3, //1 ~ 11
// quality: [40, 60]
}))
.pipe(gulp.dest("dist/images"))
});