Fix rust-analyzer

[ShadowJonathan]

This patch fixes rust-analyzer on vscode, by temporarily patching the requirements to a commit version of ed25519-dalek

You can see the differences here: dalek-cryptography/ed25519-dalek@1.0.1...ad461f4

The following difference is what makes this patch workable;

-#![cfg(not(test))]
-#![forbid(unsafe_code)]
+#![cfg_attr(not(test), forbid(unsafe_code))]

From dalek-cryptography/ed25519-dalek#173;

Yes since this was added in 1.0.1, rust-analyzer is not happy since it compiles everything in test mode

This should be applied as long as ed25519-dalek 1.1 isn't out, or this crate has to be published to crates.io

[poljar]

As discussed privately, this will have to wait for a ed25519-dalek release.

[ShadowJonathan]

#61