Fix beta clippy complaints.

CHANGELOG.md

@@ -21,6 +21,9 @@ and this project adheres to Rust's notion of
   - `impl memuse::DynamicUsage for OrchardDomain`
 - `orchard::builder::SpendInfo::new`
 - `orchard::circuit::Circuit::from_action_context`
+- impls of `Eq` for:
+  - `orchard::zip32::ChildIndex`
+  - `orchard::value::ValueSum`
 
 ### Changed
 - Migrated to `zcash_note_encryption 0.2`.

src/value.rs

@@ -144,7 +144,7 @@ pub(crate) enum Sign {
 }
 
 /// A sum of Orchard note values.
-#[derive(Clone, Copy, Debug, Default, PartialEq)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
 pub struct ValueSum(i128);
 
 impl ValueSum {

src/zip32.rs

@@ -65,7 +65,7 @@ impl FvkTag {
 }
 
 /// A hardened child index for a derived key.
-#[derive(Copy, Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub struct ChildIndex(u32);
 
 impl TryFrom<u32> for ChildIndex {