Auto-refresh imports

[nsheff]

One challenge I have is when I update a crate, it doesn't automatically update all the crates that import the updated crate.

For example, databio/nsheff imports databio/sciquill. If I do bulker load databio/sciquill to upgrade it, then it will not also update the versions of the images for databio/nsheff; I would have to do, also, bulker load databio/nsheff --recurse -- with the extra recurse parameter to re-load the crates under it.

This works and everything but it's inconvenient.

Some ways to solve could be:

• loading a crate automatically finds any importing crates and updates those shims?
• maybe bulker update should be like bulker load but just for updating, and would also handle imports?
• could imported shims be symlinked instead of duplicated?
• could imported shims be imported via PATH update instead of duplicated?

You can use bulker reload, but this is overkill since it does it to everything.