Gulp 3 - Makes js files 3 times bigger then normal files

Having a problem with a gulp and js file minifications, gulp makes 3 times bigger files.

For example lightgallery.min.js - 49kb (downloaded from GitHub) then I download the same file via npm and required in js file (same if I insert downloaded file content from github)

global.lightgallery = require('lightgallery');

and run gulp it makes file 133kb

GULP TASK

gulp.task('scripts', function() {
    gulp.src( SOURCEPATHS.jsSource )
        .pipe( browserify() )
        .pipe( uglify() )
        .pipe( rename({ extname: '.min.js' }) )
        .pipe( gulp.dest(APPPATH.js) );
});

Not using any sourcemaps.

Maybe someone was having the same problem?

from Gulp 3 - Makes js files 3 times bigger then normal files