radicle: fix cyphernet flag & update deps

The `cyphernet` package has two feature flags that delegate to
underlying crates. These are:
* ed25519 = cyphergraphy/ed25519
* p2p-ed25519 = cypheraddr/p2p-ed25519

When attempting to install binaries, the compiler will result in an
error:
```
error[E0432]: unresolved import `cyphernet::addr::PeerAddr`
  --> radicle/src/node.rs:26:9
   |
26 | pub use cyphernet::addr::PeerAddr;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^ no `PeerAddr` in the root
```

The `PeerAddr` type is only exported when `p2p-ed25519` or
`cypheraddr/p2p-secp256k1` is enabled. The `radicle` crate was using
the `ed25519` flag. Instead, the `p2p-ed25519` flag should be used.

No explanation as to why the previous flag was working could be found,
but is being discussed on Zulip[[0]].

To update the dependencies, a `cargo update` was also excuted to
update the dependencies.

[0]: https://radicle.zulipchat.com/#narrow/stream/369277-heartwood/topic/cyphernet.20dubious.20feature.20flag

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

radicle/Cargo.toml

@@ -12,7 +12,7 @@ test = ["qcheck", "radicle-crypto/test"]
 [dependencies]
 amplify = { version = "4.0.0", default-features = false, features = ["std"] }
 crossbeam-channel = { version = "0.5.6" }
-cyphernet = { version = "0.2.0", features = ["tor", "dns", "ed25519"] }
+cyphernet = { version = "0.2.0", features = ["tor", "dns", "p2p-ed25519"] }
 fastrand = { version = "1.9.0" }
 multibase = { version = "0.9.1" }
 localtime = { version = "1.2.0", features = ["serde"] }