RUSTSEC-2019-0004: Failure to properly verify ed25519 signatures makes any signature valid

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Failure to properly verify ed25519 signatures makes any signature valid

Details
Package	libp2p-core
Version	0.7.0
URL
Date	2019-05-15
Patched versions	^0.7.1,>= 0.8.1
Unaffected versions	< 0.3

Affected versions of this crate did not properly verify ed25519 signatures.
Any signature with a correct length was considered valid.

This allows an attacker to impersonate any node identity.

See advisory page for additional details.