Metadata V15: Derive TypeInfo for describing runtime types (#13272)

* scale_info: Derive TypeInfo for types present in runtime API

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cargo: Update Cargo.lock

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

substrate/primitives/consensus/babe/src/lib.rs

@@ -184,7 +184,7 @@ impl From<BabeConfigurationV1> for BabeConfiguration {
 }
 
 /// Configuration data used by the BABE consensus engine.
-#[derive(Clone, PartialEq, Eq, Encode, Decode, RuntimeDebug)]
+#[derive(Clone, PartialEq, Eq, Encode, Decode, RuntimeDebug, TypeInfo)]
 pub struct BabeConfiguration {
 	/// The slot duration in milliseconds for BABE. Currently, only
 	/// the value provided by this type at genesis will be used.
@@ -327,7 +327,7 @@ where
 /// the runtime API boundary this type is unknown and as such we keep this
 /// opaque representation, implementors of the runtime API will have to make
 /// sure that all usages of `OpaqueKeyOwnershipProof` refer to the same type.
-#[derive(Decode, Encode, PartialEq)]
+#[derive(Decode, Encode, PartialEq, TypeInfo)]
 pub struct OpaqueKeyOwnershipProof(Vec<u8>);
 impl OpaqueKeyOwnershipProof {
 	/// Create a new `OpaqueKeyOwnershipProof` using the given encoded
@@ -344,7 +344,7 @@ impl OpaqueKeyOwnershipProof {
 }
 
 /// BABE epoch information
-#[derive(Decode, Encode, PartialEq, Eq, Clone, Debug)]
+#[derive(Decode, Encode, PartialEq, Eq, Clone, Debug, TypeInfo)]
 pub struct Epoch {
 	/// The epoch index.
 	pub epoch_index: u64,