Hide loom from dependency graph #665
Description
The way loom is set up now, loom and its dependencies show up in my dep graph as soon as I depend on crossbeam-utils or crossbeam-epoch. It would be nice to avoid this, for example as done in https://github.com/hawkw/sharded-slab/pull/52/files. (I can do the legwork on this if you like.)