fix(deps): update dependency postcss-selector-parser to v7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-selector-parser	6.1.2 -> 7.0.0

---

Release Notes

postcss/postcss-selector-parser (postcss-selector-parser)

### [`v7.0.0`](https://redirect.github.com/postcss/postcss-selector-parser/blob/HEAD/CHANGELOG.md#700) [Compare Source](https://redirect.github.com/postcss/postcss-selector-parser/compare/v6.1.2...v7.0.0) - Feat: make insertions during iteration safe (major)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), 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 was generated by Mend Renovate. View the repository job log.