chore: upgrade node version

[huyenltnguyen]

Checklist:

• I have read freeCodeCamp's contribution guidelines.
• My pull request has a descriptive title (not a vague title like Update index.md)

Upgrade Node version to 18 as v14 is no longer supported.

Ref: https://endoflife.date/nodejs

[socket-security]

New dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
eventsourcemock	2.0.0	None	+0	183 kB	gcedo

[huyenltnguyen]

The latest npm version is 10, but it's quite new so I would rather wait until other dependencies are fairly up-to-date.

I'm using Node 18 and npm 9 on my machine, and things are working properly.

[huyenltnguyen]

The change in this file is large because npm needed to update the metadata:

[huyenltnguyen]

There is a failing test in the repo:

I was able to fix it following this guide: https://stackoverflow.com/a/75390265 (required adding eventsourcemock as a dev dependency).

[huyenltnguyen]

Sigh.

There is a conflict in the React version we use and sentry-javascript uses. The older npm versions only display a warning, but the newer versions error out.

I'll raise a PR to upgrade sentry-javascript first since it's also quite outdated (we are 2 major versions behind).