chore: Update Vitest async test expectations and remove unused dependencies.

src/libs/promiseTimeout.spec.ts

@@ -3,8 +3,8 @@ import { describe, expect, it } from "vitest";
 import { PromiseTimedOutError, promiseTimeout } from "./promiseTimeout";
 
 describe("promiseTimeout", () => {
-  it("promise resolves within timeout, returns value", () => {
-    expect(
+  it("promise resolves within timeout, returns value", async () => {
+    await expect(
       promiseTimeout(
         wait(1).then(() => 2),
         10,
@@ -12,8 +12,8 @@ describe("promiseTimeout", () => {
     ).resolves.toBe(2);
   });
 
-  it("promise does not resolve within timeout, throws PromiseTimedOutError", () => {
-    expect(
+  it("promise does not resolve within timeout, throws PromiseTimedOutError", async () => {
+    await expect(
       promiseTimeout(
         wait(2).then(() => 2),
         1,