chore(deps): update dependency webpack-merge to v6

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
webpack-merge	5.10.0 -> 6.0.1

---

Release Notes

survivejs/webpack-merge (webpack-merge)

v6.0.1

Compare Source

• Fix - Restore usage of clone-deep as there was a corner case where structuredClone did not work as expected. #​214

v6.0.0

Compare Source

• Chore - Update internal dependencies. As a result, the package needs at least Node 18 to run.
• Chore - Use structuredClone over clone-deep dependency since it is included to Node 18 or above. #​214

---

Configuration

📅 Schedule: Branch creation - "before 3am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 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 this update 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]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.62%. Comparing base (369d85a) to head (56a3424).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5270      +/-   ##
==========================================
- Coverage   94.63%   94.62%   -0.02%     
==========================================
  Files         323      323              
  Lines        8068     8068              
  Branches     1637     1637              
==========================================
- Hits         7635     7634       -1     
- Misses        433      434       +1     

see 1 file with indirect coverage changes