Release 0.12.0

Added

• PR#42 added support for features, adding nodes for each unique future, and linking edges between dependencies and features themselves. This (hopefully) properly takes into account the existing ways of pruning the graph via targets, exclusions etc. It also allows the retrieval of that final feature set via Krates::get_enabled_features.

Fixed

• PR#42 resolved #41 by properly pruning weak dependencies that were improperly resolved by cargo.