The behavior of some libraries have been modified:
- rimraf now returns a promise instead of calling a callback method
- gulp-imagemin can't be fully upgraded without switching to MJS
Foundation 6.8.1 doesn't seem to have broken anything we use,
as far as we can tell without web UI tests.
This prepares work for T2004, so the assets alkane recipe will be able
to build an up-to-date version of this repository to extract both
app.js and app.css, used for other infrastructure sites.