Apply missing serde camelCase attributes (#514)

crates/metadata/src/layout/mod.rs

@@ -319,6 +319,7 @@ pub enum CryptoHasher {
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
 ))]
+#[serde(rename_all = "camelCase")]
 pub struct ArrayLayout<F: Form = MetaForm> {
     /// The offset key of the array layout.
     ///
@@ -522,6 +523,7 @@ impl Discriminant {
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
 ))]
+#[serde(rename_all = "camelCase")]
 pub struct EnumLayout<F: Form = MetaForm> {
     /// The key where the discriminant is stored to dispatch the variants.
     dispatch_key: LayoutKey,

crates/metadata/src/layout/tests.rs

@@ -161,7 +161,7 @@ fn clike_enum_work() {
     let expected = serde_json::json! {
         {
             "enum": {
-                "dispatch_key": "0x\
+                "dispatchKey": "0x\
                     0000000000000000\
                     0000000000000000\
                     0000000000000000\
@@ -242,7 +242,7 @@ fn mixed_enum_work() {
     let expected = serde_json::json! {
         {
             "enum": {
-                "dispatch_key": "0x\
+                "dispatchKey": "0x\
                     0000000000000000\
                     0000000000000000\
                     0000000000000000\