Bump to v0.27.0

[moCello]

0.27.0 - 2024-04-24

Added

• Add an Encryption module that uses AES-GCM [Implement and use the AES cipher instead of PoseidonCipher #152]
• Add Zeroize trait implmentation for SecretKey [Secret values not erased #155]

Changed

• Use AES-GCM from the Encryption module throughout the code, instead of PoseidonCipher.
• Rename SecretKey::sk_r to SecretKey::gen_note_sk [Rename SecretKey::sk_r to generate_note_sk and StealthAddress::pk_r to note_pk #156]
• Rename StealthAddress::pk_r to StealthAddress::note_pk [Rename SecretKey::sk_r to generate_note_sk and StealthAddress::pk_r to note_pk #156]
• Update bls12_381-bls to v0.3.0
• Update jubjub-schnorr to v0.3.0

Removed

• Remove the Message module.
• Remove StealthAddress::address method [Rename SecretKey::sk_r to generate_note_sk and StealthAddress::pk_r to note_pk #156]
• Remove Copy from SecretKey [Secret values not erased #155]
• Remove From<SecretKey> for ViewKey and PublicKey, use From<&SecretKey> instead [Secret values not erased #155]