fix use of option for expiry in tests

src/serialization.rs

@@ -253,7 +253,7 @@ mod tests {
                     Vec::from(b"option 2"),
                     Vec::from(b"option 3"),
                 ],
-                expiry: u32::MAX,
+                expiry: Some(u32::MAX),
             },
             outcome_payouts: BTreeMap::from([
                 (Outcome::Attestation(0), PayoutWeights::from([(0, 1)])),

tests/regtest.rs

@@ -353,7 +353,7 @@ fn simple_ticketed_dlc_simulation() {
                 Vec::from(b"alice and bob win"),
                 Vec::from(b"carol and dave win"),
             ],
-            expiry: u32::try_from(block_height + 2000).unwrap(),
+            expiry: u32::try_from(block_height + 2000).ok(),
         },
         outcome_payouts,
         fee_rate: FeeRate::from_sat_per_vb_unchecked(100),