fix: npm install fails due to @testing-library/react-hooks peer dependency conflict

[JeanYoungPark]

Hello!
I noticed that contributors using npm cannot install dependencies without using --legacy-peer-deps flag due to a peer dependency conflict with@testing-library/react-hooks.

Problem

Contributors using npm cannot install dependencies without using --legacy-peer-deps flag due to a peer dependency conflict with @testing-library/react-hooks.

Error with npm:

npm install
# npm ERR! ERESOLVE unable to resolve dependency tree
# npm ERR! Could not resolve dependency:
# npm ERR! peer react@"^16.9.0 || ^17.0.0" from @testing-library/react-hooks@8.0.1

Warning with yarn:

  yarn install
  # warning " > @testing-library/react-hooks@8.0.1" has incorrect peer dependency "react@^16.9.0 || ^17.0.0".

Root Cause

• This project uses React 18.3.1 for development
• This conflicts with the project's React 18.3.1, causing npm to block installation
• However, @testing-library/react@16.3.0 already includes renderHook API (available since v13.1)

Proposed Solution

1. Remove from package.json:

"devDependencies": {
    "@testing-library/react": "16.3.0",
-   "@testing-library/react-hooks": "8.0.1",
     ...
  }

2. Update imports in test files:

- import { renderHook } from '@testing-library/react-hooks';
+ import { renderHook } from '@testing-library/react';

Affected files:

• src/use-countdown.test.tsx
• src/use-time.test.tsx

I'm happy to submit a PR for this if you'd like! 🙂

[JeanYoungPark]

Also removed result.error checks since they're no longer needed @testing-library/react automatically fails tests when hooks throw errors.