Transform for dgraph which extract dependencies from CSS by analyzing its
@import declarations and then resolving it using Node module resolving
mechanism. Can be used along with css-pack to produce bundles of CSS files
along with dependencies.
% npm install dgraph-css-import dgraph css-pack deps-sort
% dgraph --transform dgraph-css-import ./main.css \
| deps-sort
| css-pack
> ./bundle.css