chore(deps): update dependency eslint-plugin-regexp to v2.3.0 (#208)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[eslint-plugin-regexp](https://togithub.com/ota-meshi/eslint-plugin-regexp)
| [`2.2.0` ->
`2.3.0`](https://renovatebot.com/diffs/npm/eslint-plugin-regexp/2.2.0/2.3.0)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/eslint-plugin-regexp/2.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/eslint-plugin-regexp/2.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/eslint-plugin-regexp/2.2.0/2.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/eslint-plugin-regexp/2.2.0/2.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>ota-meshi/eslint-plugin-regexp (eslint-plugin-regexp)</summary>

###
[`v2.3.0`](https://togithub.com/ota-meshi/eslint-plugin-regexp/blob/HEAD/CHANGELOG.md#230)

[Compare
Source](https://togithub.com/ota-meshi/eslint-plugin-regexp/compare/v2.2.0...v2.3.0)

##### Minor Changes

- Add support for flat config
([#&#8203;702](https://togithub.com/ota-meshi/eslint-plugin-regexp/pull/702))

</details>

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