fix(cardano-blockchain-types): add partailOrd to Fork

Signed-off-by: bkioshn <[email protected]>

Author: bkioshn

rust/cardano-blockchain-types/src/fork.rs

@@ -8,7 +8,7 @@
 
 use crate::conversion::from_saturating;
 
-#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, PartialOrd)]
 /// Counter that is incremented every time there is a roll-back in live-chain
 pub struct Fork(u64);