chore(deps): update dependency @edx/eslint-config to v4.3.0 (#458)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[@edx/eslint-config](https://redirect.github.com/openedx/eslint-config)
| [`4.2.0` ->
`4.3.0`](https://renovatebot.com/diffs/npm/@edx%2feslint-config/4.2.0/4.3.0)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/@edx%2feslint-config/4.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@edx%2feslint-config/4.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@edx%2feslint-config/4.2.0/4.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@edx%2feslint-config/4.2.0/4.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>openedx/eslint-config (@&#8203;edx/eslint-config)</summary>

###
[`v4.3.0`](https://redirect.github.com/openedx/eslint-config/releases/tag/v4.3.0)

[Compare
Source](https://redirect.github.com/openedx/eslint-config/compare/v4.2.0...v4.3.0)

##### Features

- Don't require default export for single-export modules
([d8fb42c](https://redirect.github.com/openedx/eslint-config/commit/d8fb42c9773db40841c1f9a534615494e1390a3d))
- Turn off the 'no-restricted-syntax' rule which isn't relevant
([3f17bb7](https://redirect.github.com/openedx/eslint-config/commit/3f17bb7600c437bdf2ef08796ca23580822253c4))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am on Monday" in timezone
America/New_York, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

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

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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View the [repository job
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