Replace dependency @tsconfig/node18 with @tsconfig/node20

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@tsconfig/node18 (source) → @tsconfig/node20		replacement	18 → 20
@tsconfig/node18 (source) → @tsconfig/node20	devDependencies	replacement	18.2.4 → 20.1.0

This is a special PR that replaces @tsconfig/node18 with the community suggested minimal stable replacement version.

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.17%. Comparing base (b51c5b7) to head (66d0635).
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #190   +/-   ##
=======================================
  Coverage   91.17%   91.17%           
=======================================
  Files           8        8           
  Lines         238      238           
  Branches       62       62           
=======================================
  Hits          217      217           
  Misses         20       20           
  Partials        1        1           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.