bump ed25519-dalek to 2.0 (#14776)

* bump ed25519-dalek to 2.0

* sp-statement-store: don't use deprecated SecretKey::new

* Remove snow patch

---------

Co-authored-by: Sebastian Kunert <skunert49@gmail.com>

substrate/primitives/io/Cargo.toml

@@ -33,9 +33,7 @@ tracing = { version = "0.1.29", default-features = false }
 tracing-core = { version = "0.1.28", default-features = false}
 
 # Required for backwards compatibility reason, but only used for verifying when `UseDalekExt` is set.
-ed25519-dalek = { version = "1.0.1", default-features = false, optional = true }
-# Force the usage of ed25519, this is being used in `ed25519-dalek`.
-ed25519 = { version = "1.5.2", optional = true }
+ed25519-dalek = { version = "2.0.0", default-features = false, optional = true }
 
 [build-dependencies]
 rustversion = "1.0.6"
@@ -58,7 +56,6 @@ std = [
 	"tracing-core/std",
 	"log",
 	"ed25519-dalek",
-	"ed25519",
 	"sp-keystore/std"
 ]