Handle glob `pub use` imports

[obi1kenobi]

Right now, glob imports are ignored for purposes of calculating the "importable paths" of an item.

This is likely to cause false-negative issues where items aren't scanned but they should be. If moving from a non-glob to a glob pub use, this could also cause a false-positive "item was removed" issue. The circumstances to trigger a false-positive are exceedingly rare, but this should be fixed soon regardless.