Derive Encode/Decode for BlockId (#10063)

substrate/primitives/runtime/src/generic/block.rs

@@ -35,7 +35,7 @@ use sp_core::RuntimeDebug;
 use sp_std::prelude::*;
 
 /// Something to identify a block.
-#[derive(PartialEq, Eq, Clone, RuntimeDebug)]
+#[derive(PartialEq, Eq, Clone, Encode, Decode, RuntimeDebug)]
 #[cfg_attr(feature = "std", derive(Serialize))]
 #[cfg_attr(feature = "std", serde(rename_all = "camelCase"))]
 #[cfg_attr(feature = "std", serde(deny_unknown_fields))]