Manually impl PartialEq for bls::PublicKey

To fix: https://rust-lang.github.io/rust-clippy/master/#derive_hash_xor_eq

beacon_chain/utils/bls/src/public_key.rs

@@ -7,7 +7,7 @@ use std::hash::{Hash, Hasher};
 ///
 /// This struct is a wrapper upon a base type and provides helper functions (e.g., SSZ
 /// serialization).
-#[derive(Debug, PartialEq, Clone, Eq)]
+#[derive(Debug, Clone, Eq)]
 pub struct PublicKey(RawPublicKey);
 
 impl PublicKey {
@@ -35,6 +35,12 @@ impl Decodable for PublicKey {
     }
 }
 
+impl PartialEq for PublicKey {
+    fn eq(&self, other: &PublicKey) -> bool {
+        ssz_encode(self) == ssz_encode(other)
+    }
+}
+
 impl Hash for PublicKey {
     fn hash<H: Hasher>(&self, state: &mut H) {
         ssz_encode(self).hash(state)