Update bip0039 for Arti support in Zebra

[emersonian]

Upgrading bip0039 to v0.12 in zcash_primitives resolves Zebra's ability to build with Arti (Tor) support.

Patch versions will need to be released of the following crates to simplify integration with Zebra:

• zcash_primitives: v0.13.1
• zcash_client_backend: v0.10.1 (depending upon zcash_primitives v0.13.1)
• zcash_proofs: v0.13.1 (depending upon zcash_primitives v0.13.1)
• zcash_script: v0.1.16 (depending upon zcash_primitives v0.13.1)

Demonstration of a working build

See ZcashFoundation/zebra#8328

[str4d]

NACK for the same reason as when this was proposed in #1261.

We attempted to upgrade from bip0039 0.10 in #808, but had to downgrade in #812 because the change in bip0039 0.11 to use generics resulted in me spending several hours fighting and losing to the C++ template system in zcashd.

While zcashd depends on bip0039 0.10 via zcash_primitives::zip339, we will not be upgrading this dependency. If someone else wants to fight the C++ template system to enable this, let me know!

[str4d]

Also, as a side-note:

Patch versions will need to be released

As documented in the Cargo.toml that you edited, bip0039 is exposed in our API, and thus changing its left-most non-negative version integer is a SemVer-breaking change in Rust.

[nuttycom]

@str4d zip339 is simply a reexport of the bip0039 crate, and nothing in librustzcash depends upon it. Also, given the extraction of zcash_keys, I don't think that it's appropriate for this to live in zcash_primitives any longer anyway. I recommend that we simply remove the zip339 module entirely, which then decouples the use of bip0039 in zcashd from any potential use in zebra.

[nuttycom]

@emersonian instead of this, please just revert #424 instead. This will require a major version bump to zcash_primitives and downstream crates, so make sure to note the zip339 module as removed in the CHANGELOG so that we remember that a major version bump is required.

[daira]

Superceded by #1391.