Bump ed25519-dalek from 1.0.1 to 2.0.0

[dependabot]

Bumps ed25519-dalek from 1.0.1 to 2.0.0.

Changelog

Sourced from ed25519-dalek's changelog.

2.0.0

• Fix a data modeling error in the serde feature pointed out by Trevor Perrin which caused points and scalars to be serialized with length fields rather than as fixed-size 32-byte arrays. This is a breaking change, but it fixes compatibility with serde-json and ensures that the serde-bincode encoding matches the conventional encoding for X/Ed25519.
• Update rand_core to 0.5, allowing use with new rand versions.
• Switch from clear_on_drop to zeroize (by Tony Arcieri).
• Require subtle = ^2.2.1 and remove the note advising nightly Rust, which is no longer required as of that version of subtle. See the subtle changelog for more details.
• Update README.md for 2.x series.
• Remove the build.rs hack which loaded the entire crate into its own build.rs to generate constants, and keep the constants in the source code.

The only significant change is the data model change to the serde feature; besides the rand_core version bump, there are no other user-visible changes.

1.2.3

• Fix an issue identified by a Quarkslab audit (and Jack Grigg), where manually constructing unreduced Scalar values, as needed for X/Ed25519, and then performing scalar/scalar arithmetic could compute incorrect results.
• Switch to upstream Rust intrinsics for the IFMA backend now that they exist in Rust and don't need to be defined locally.
• Ensure that the NAF computation works correctly, even for parameters never used elsewhere in the codebase.
• Minor refactoring to EdwardsPoint decompression.
• Fix broken links in documentation.
• Fix compilation on nightly broken due to changes to the #[doc(include)] path root (not quite correctly done in 1.2.2).

1.2.2

• Fix a typo in an internal doc-comment.
• Add the "crypto" tag to crate metadata.
• Fix compilation on nightly broken due to changes to the #[doc(include)] path root.

1.2.1

• Fix a bug in bucket index calculations in the Pippenger multiscalar algorithm for very large input sizes.
• Add a more extensive randomized multiscalar multiplication consistency check to the test suite to prevent regressions.
• Ensure that that multiscalar and NAF computations work correctly on extremal Scalar values constructed via from_bits.

1.2.0

... (truncated)

Commits

• d889ac8 Finalize 2.0.0
• db6a0b1 Merge branch 'master' into develop
• 58d32ea Merge branch 'release/2.0.0-alpha.2'
• 69d72f9 Bump version to 2.0.0-alpha.2 and update changelog.
• 0168816 Merge pull request #307 from dalek-cryptography/update-nightly-note-subtle
• 2b51978 Remove nightly recommendation now that subtle has stable opt barriers.
• 77203aa Merge pull request #306 from isislovecruft/feature/236-merge-rebase
• 4d1dfba Merge pull request #305 from isislovecruft/fix/unused-tmp2-warning
• 4423394 Fix warning that a temporary value isn't used.
• 57f19e0 Merge remote-tracking branch 'DebugSteven/zeroize' into feature/236-merge-rebase
• Additional commits viewable in compare view

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[kengggg]

The code breaks too much. Refer to PR #2 instead.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.