chore(deps): update dependency web-ext-plugin to v2.13.0 (#1831)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Adoption](https://docs.renovatebot.com/merge-confidence/) |
[Passing](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|---|---|
|
[web-ext-plugin](https://redirect.github.com/hiikezoe/web-ext-webpack-plugin)
| [`2.12.0` →
`2.13.0`](https://renovatebot.com/diffs/npm/web-ext-plugin/2.12.0/2.13.0)
|
![age](https://developer.mend.io/api/mc/badges/age/npm/web-ext-plugin/2.13.0?slim=true)
|
![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/web-ext-plugin/2.13.0?slim=true)
|
![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/web-ext-plugin/2.12.0/2.13.0?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/web-ext-plugin/2.12.0/2.13.0?slim=true)
|

---

### Release Notes

<details>
<summary>hiikezoe/web-ext-webpack-plugin (web-ext-plugin)</summary>

###
[`v2.13.0`](https://redirect.github.com/hiikezoe/web-ext-webpack-plugin/compare/v2.12.0...v2.13.0)

[Compare
Source](https://redirect.github.com/hiikezoe/web-ext-webpack-plugin/compare/v2.12.0...v2.13.0)

</details>

---

### Configuration

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America/Los_Angeles, 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.

---

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this box

---

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