Bump ed25519-zebra to released version (2.2.0)

Cargo.toml

@@ -9,6 +9,7 @@ license = "GPL-3.0-or-later"
 [dependencies]
 async-trait = "0.1"
 chacha20poly1305 = { version = "0.5.1", default-features = false, features = ["alloc", "chacha20"] }
+ed25519-zebra = "2.2"
 futures = "0.3"
 generic-array = { version = "0.14", features = ["serde"] }
 lazy_static = "1"
@@ -20,11 +21,6 @@ rand = "0.7"
 scrypt = { version = "0.4", default-features = false }
 thiserror = "1.0"
 
-[dependencies.ed25519-zebra]
-version = "2.1.2"
-branch = "main"
-git = "https://github.com/radicle-dev/ed25519-zebra"
-
 [dev-dependencies]
 async-std = { version = "1", features = ["attributes"] }
 ed25519-dalek = "=1.0.0-pre.4" # lolwut?