Log Message:
py-cryptodome: updated to 3.15.0

3.15.0

New features
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* Add support for curves Ed25519 and Ed448, including export and import of keys.
* Add support for EdDSA signatures.
* Add support for Asymmetric Key Packages (RFC5958) to import private keys.

Resolved issues
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* GH-620: for ``Crypto.Util.number.getPrime`` , do not sequentially
  scan numbers searching for a prime.