ed25519: Don't panic for invalid signature (#12965)

* ed25519: Don't panic for invalid signature

We should not panic for an invalid signature when the `UseDalekExt` is given.

* Update Cargo.toml

* Update primitives/io/Cargo.toml

substrate/Cargo.lock

@@ -1566,9 +1566,9 @@ dependencies = [
 
 [[package]]
 name = "ed25519"
-version = "1.0.3"
+version = "1.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37c66a534cbb46ab4ea03477eae19d5c22c01da8258030280b7bd9d8433fb6ef"
+checksum = "1e9c280362032ea4203659fc489832d0204ef09f247a0506f170dafcac08c369"
 dependencies = [
  "signature",
 ]
@@ -9181,6 +9181,7 @@ name = "sp-io"
 version = "7.0.0"
 dependencies = [
  "bytes",
+ "ed25519",
  "ed25519-dalek",
  "futures",
  "libsecp256k1",