Add bridge_update stub

crates/lox-library/src/lib.rs

@@ -309,6 +309,11 @@ impl BridgeAuth {
         self.bridge_table.spares.insert(bnum);
     }
 
+    pub fn bridge_update(&mut self, bridge: &BridgeLine, bdb: &mut BridgeDb) -> bool {
+        
+        false
+    }
+
     /// Mark a bridge as unreachable
     ///
     /// This bridge will be removed from each of the buckets that