fix: temporary disable UMD bundling
fix: temporary disable UMD bundling

:warning: this must be resolved before the next release

Temporary disable UMD bundling, waiting for a way to import plugins are externals

See https://github.com/zurb/foundation-sites/pull/10903

zurb/foundation-sites,colin-marshall/foundation-sites,colin-marshall/foundation-sites,abdullahsalem/foundation-sites,colin-marshall/foundation-sites,dragthor/foundation-sites,abdullahsalem/foundation-sites,atmmarketing/foundation-sites,zurb/foundation-sites,zurb/foundation,denisahac/foundation-sites,DaSchTour/foundation-sites,atmmarketing/foundation-sites,zurb/foundation,denisahac/foundation-sites,dragthor/foundation-sites,zurb/foundation,atmmarketing/foundation-sites,abdullahsalem/foundation-sites,dragthor/foundation-sites,zurb/foundation-sites,DaSchTour/foundation-sites,denisahac/foundation-sites