chore(deps): update dependency postcss to v8.4.36 (#871)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [postcss](https://postcss.org/)
([source](https://togithub.com/postcss/postcss)) | [`8.4.35` ->
`8.4.36`](https://renovatebot.com/diffs/npm/postcss/8.4.35/8.4.36) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/postcss/8.4.36?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/postcss/8.4.35/8.4.36?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|

---

### Release Notes

<details>
<summary>postcss/postcss (postcss)</summary>

###
[`v8.4.36`](https://togithub.com/postcss/postcss/blob/HEAD/CHANGELOG.md#8436)

[Compare
Source](https://togithub.com/postcss/postcss/compare/8.4.35...8.4.36)

- Fixed `original.column are not numbers` error on broken previous
source map.

</details>

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