Updated some dependencies, got rid of Bitcoin stuff which wasn't in use

crates/oracle-demo/src/main.rs

@@ -139,12 +139,12 @@ impl OracleNode {
     }
 
     fn submit_price(&self) {
-        let mut rng = rand::thread_rng();
+        let mut rng = rand::rng();
 
         let price = if self.is_byzantine {
             self.base_price * 1.2 // Try to manipulate 20% higher
         } else {
-            self.base_price * (1.0 + rng.gen_range(-0.01..0.01))
+            self.base_price * (1.0 + rng.random_range(-0.01..0.01))
         };
 
         let attestation = PriceAttestation {