Update Rust crate sapling to 0.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
sapling	dependencies	minor	0.3 -> 0.4

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Release Notes

zcash/sapling-crypto (sapling)

v0.4.0

Compare Source

Added

• Support for Partially-Created Zcash Transactions:
  • sapling_crypto::builder::Builder::build_for_pczt
  • sapling_crypto::pczt module.
• sapling_crypto::bundle::EffectsOnly
• sapling_crypto::keys:
  • SpendAuthorizingKey::to_bytes
  • SpendValidatingKey::to_bytes
• sapling_crypto::value::ValueSum::to_raw
• sapling_crypto::zip32::DiversifiableFullViewingKey::to_internal_fvk

Fixed

• sapling_crypto::prover::OutputProver::prepare_circuit now takes esk as an
  sapling_crypto::keys::EphemeralSecretKey, matching the existing public APIs
  that expose it.

Changed

• sapling_crypto::builder:
  • SpendInfo::new now takes a FullViewingKey instead of a
    ProofGenerationKey.
  • Builder::add_spend now takes a FullViewingKey instead of an
    &ExtendedSpendingKey.
  • Builder::build and bundle now take an &[ExtendedSpendingKey] argument.
  • Error has new variants:
    • MissingSpendingKey
    • PcztRequiresZip212
    • WrongSpendingKey
• sapling_crypto::bundle::SpendDescriptionV5::into_spend_description now
  supports any Authorization for which the SpendDescription itself is fully
  authorized.

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---

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---

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: src/nerdbank-zcash-rust/Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path src/nerdbank-zcash-rust/Cargo.toml --workspace
    Updating crates.io index
error: failed to get `zcash_address` as a dependency of package `nerdbank-zcash-rust v0.1.0 (/tmp/renovate/repos/github/nerdcash/Nerdbank.Cryptocurrencies/src/nerdbank-zcash-rust)`

Caused by:
  failed to load source for dependency `zcash_address`

Caused by:
  Unable to update /tmp/renovate/repos/github/nerdcash/Nerdbank.Cryptocurrencies/external/librustzcash/components/zcash_address

Caused by:
  failed to read `/tmp/renovate/repos/github/nerdcash/Nerdbank.Cryptocurrencies/external/librustzcash/components/zcash_address/Cargo.toml`

Caused by:
  No such file or directory (os error 2)