Update dependency postcss-load-config to v5

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-load-config	^4.0.0 -> ^5.0.0

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Release Notes

postcss/postcss-load-config (postcss-load-config)

### [`v5.0.2`](https://togithub.com/postcss/postcss-load-config/blob/HEAD/CHANGELOG.md#502-2022-05-23) [Compare Source](https://togithub.com/postcss/postcss-load-config/compare/5.0.1...5.0.2) ##### Bug Fixes - Fixed `__require` name conflict ([#​257](https://togithub.com/postcss/postcss-load-config/pull/257)) ### [`v5.0.1`](https://togithub.com/postcss/postcss-load-config/blob/HEAD/CHANGELOG.md#501-2022-05-23) [Compare Source](https://togithub.com/postcss/postcss-load-config/compare/v5.0.0...5.0.1) ##### Bug Fixes - Fixed Windows support ([#​256](https://togithub.com/postcss/postcss-load-config/pull/256)) ### [`v5.0.0`](https://togithub.com/postcss/postcss-load-config/compare/v4.0.2...v5.0.0) [Compare Source](https://togithub.com/postcss/postcss-load-config/compare/v4.0.2...v5.0.0)

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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.

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