See issues regarding the dalek-cryptography organization:

• Clarification on possible crate-owner lockout dalek-cryptography/curve25519-dalek#345
• Update rand_core to 0.6 dalek-cryptography/curve25519-dalek#338 (comment)

I'm not sure I'm comfortable continuing to rely on the subtle crate. The above seem to be somewhat opposing statements of what has happened, though I still feel weird about the removal of crate owners, even if "warranted" by the maintainer of the org. IMHO, the thing should have happened with more transparency to begin with (like they should've made an announcement).

Currently, I'm leaning towards switching to subtle-ng.