Fix tests

Author: mrlika

test/memory/heap-usage.ts

@@ -71,7 +71,7 @@ console.log(
 console.log("\nremoving peers");
 
 for (const peer of sockets) {
-  tracker.disconnectPeers(peer);
+  tracker.disconnect(peer);
 }
 
 sockets.length = 0;

test/simulation.test.ts

@@ -76,7 +76,7 @@ describe("simulation", () => {
           return;
         } else if (random < 0.06) {
           // disconnect
-          tracker.disconnectPeers(peer);
+          tracker.disconnect(peer);
           peerData.infoHash = undefined;
           sockets[peerIndex] = {};
           return;