Update integration_tests_vss to updated rand dependency.

76194c7 bumped the `rand`
dependency but because `integration_tests_vss` was already not
passing it neglected to also update it for the new API. We do so
here.

Author: TheBlueMatt

tests/integration_tests_vss.rs

@@ -13,7 +13,7 @@ use std::collections::HashMap;
 
 use ldk_node::entropy::NodeEntropy;
 use ldk_node::Builder;
-use rand::{rng, Rng};
+use rand::{rng, RngCore};
 
 #[tokio::test(flavor = "multi_thread", worker_threads = 1)]
 async fn channel_full_cycle_with_vss_store() {
@@ -63,7 +63,7 @@ async fn vss_v0_schema_backwards_compatibility() {
 
 	let storage_path = common::random_storage_path().to_str().unwrap().to_owned();
 	let mut seed_bytes = [42u8; 64];
-	rand::thread_rng().fill_bytes(&mut seed_bytes);
+	rand::rng().fill_bytes(&mut seed_bytes);
 	let node_entropy = NodeEntropy::from_seed_bytes(seed_bytes);
 
 	// Setup a v0.6.2 `Node` persisted with the v0 scheme.
@@ -131,7 +131,7 @@ async fn vss_node_restart() {
 
 	let storage_path = common::random_storage_path().to_str().unwrap().to_owned();
 	let mut seed_bytes = [42u8; 64];
-	rand::thread_rng().fill_bytes(&mut seed_bytes);
+	rand::rng().fill_bytes(&mut seed_bytes);
 	let node_entropy = NodeEntropy::from_seed_bytes(seed_bytes);
 
 	// Setup initial node and fund it.