JS files are not bundling properly

[HannanAkbar]

The build is failing because JS files are not bundling properly.

[HannanAkbar]

It turns out that gulp-uglify-es is not bundling files as expected. I'm adding gulp-concat for that purpose. Also it'll eliminate the need for gulp-rename.

[ArslanAmeer]

OK. So by adding gulp-concat, gulp will minify and concat both minifed files into single file!