chore(deps): update dependency web-ext to v7.11.0 (#288)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [web-ext](https://togithub.com/mozilla/web-ext) | [`7.8.0` ->
`7.11.0`](https://renovatebot.com/diffs/npm/web-ext/7.8.0/7.11.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/web-ext/7.11.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/web-ext/7.11.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/web-ext/7.8.0/7.11.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/web-ext/7.8.0/7.11.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>mozilla/web-ext (web-ext)</summary>

###
[`v7.11.0`](https://togithub.com/mozilla/web-ext/releases/tag/7.11.0)

[Compare
Source](https://togithub.com/mozilla/web-ext/compare/7.10.0...7.11.0)

📣 We're finalizing web-ext v8 (the next major release), which will use a
new AMO API to sign add-ons. Please try it out now by passing the
`--use-submission-api` flag to the `sign` command in web-ext v7. More
information at:
https://extensionworkshop.com/documentation/develop/web-ext-command-reference/#use-submission-api

***

#### Features

-   **web-ext lint**: updated to use `addons-linter` to `6.21.0`
- **web-ext run**: remove `READ_EXTERNAL_STORAGE` permission requirement
(backport
[#&#8203;3018](https://togithub.com/mozilla/web-ext/issues/3018))

See all changes:
mozilla/web-ext@7.10.0...7.11.0

###
[`v7.10.0`](https://togithub.com/mozilla/web-ext/releases/tag/7.10.0)

[Compare
Source](https://togithub.com/mozilla/web-ext/compare/7.9.0...7.10.0)

#### Features

-   **web-ext lint**: updated to use `addons-linter` to `6.20.0`
- **web-ext run**: fixed an issue with Firefox on macOS
([#&#8203;2975](https://togithub.com/mozilla/web-ext/issues/2975)) by
updating `fx-runner` to `1.4.0`

See all changes:
mozilla/web-ext@7.9.0...7.10.0

### [`v7.9.0`](https://togithub.com/mozilla/web-ext/releases/tag/7.9.0)

[Compare
Source](https://togithub.com/mozilla/web-ext/compare/7.8.0...7.9.0)

#### Features

- **web-ext lint**: updated to use
[addons-linter](https://togithub.com/mozilla/addons-linter/releases)
`6.19.0` (it was `6.13.0` before)

See all changes:
mozilla/web-ext@7.8.0...7.9.0

</details>

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