chore(deps): update dependency postcss-loader to v8

This MR contains the following updates:

Package	Type	Update	Change
postcss-loader	devDependencies	major	7.3.4 -> 8.0.0

---

Release Notes

webpack-contrib/postcss-loader (postcss-loader)

v8.0.0

Compare Source

⚠ BREAKING CHANGES

• minimum supported Node.js version is 18.12.0 (#​677) (8dd0315)

7.3.4 (2023-12-27)

Bug Fixes

• do not crash if pkg.(d|devD)ependencies unset (#​667) (8ef0c7e)

7.3.3 (2023-06-10)

Bug Fixes

• perf: avoid using klona for postcss options (#​658) (e754c3f)
• bug with loading configurations after updating cosmiconfig to version 8.2 (684d265)

7.3.2 (2023-05-28)

Bug Fixes

• use cause to keep original errors and warnings (#​655) (e8873f4)

7.3.1 (2023-05-26)

Bug Fixes

• warning and error serialization (65748ec)

---

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 MR is behind base branch, or you tick the rebase/retry checkbox.

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

---

• If you want to rebase/retry this MR, check this box

---

This MR has been generated by Renovate Bot.