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

[renovate]

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 - "after 9pm,before 9am" in timezone Asia/Tokyo, 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 has been generated by Mend Renovate. View repository job log here.

[renovate]

Edited/Blocked Notification

Renovate will not automatically rebase this PR, because it does not recognize the last commit author and assumes somebody else may have edited the PR.

You can manually request rebase by checking the rebase/retry box above.

⚠️ Warning: custom changes will be lost.