build(deps): bump ed25519-compact from 1.0.8 to 2.0.4

[dependabot[bot]]

Bumps ed25519-compact from 1.0.8 to 2.0.4.

Commits

• 62f19b8 Bump
• cf1a0c0 Make from_bytes_vartime() available even without x25519
• 15409b1 Bump
• d2792d0 Nits
• 07db2db ed25519: switch to cofactored verification
• a3cc0e4 Add a validate() function to KeyPair
• fd9c5d0 Add a SecretKey::validate_public_key() function
• 30362ae Add DerefMut everywhere there's also a Deref
• 6908101 Add a very useful comment
• 31c714b Bump
• Additional commits viewable in compare view

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