fix(deps): update dependency postcss-safe-parser to v7 (#595)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[postcss-safe-parser](https://redirect.github.com/postcss/postcss-safe-parser)
| [`^6.0.0` ->
`^7.0.0`](https://renovatebot.com/diffs/npm/postcss-safe-parser/6.0.0/7.0.1)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/postcss-safe-parser/7.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/postcss-safe-parser/7.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/postcss-safe-parser/6.0.0/7.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/postcss-safe-parser/6.0.0/7.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>postcss/postcss-safe-parser (postcss-safe-parser)</summary>

###
[`v7.0.1`](https://redirect.github.com/postcss/postcss-safe-parser/blob/HEAD/CHANGELOG.md#701)

[Compare
Source](https://redirect.github.com/postcss/postcss-safe-parser/compare/7.0.0...7.0.1)

- Fixed JSON inside CSS support (by
[@&#8203;dengelke](https://redirect.github.com/dengelke)).

###
[`v7.0.0`](https://redirect.github.com/postcss/postcss-safe-parser/compare/6.0.0...7.0.0)

[Compare
Source](https://redirect.github.com/postcss/postcss-safe-parser/compare/6.0.0...7.0.0)

</details>

---

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are satisfied.

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---

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---

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packages/eslint-plugin-svelte/package.json

@@ -63,7 +63,7 @@
     "known-css-properties": "^0.35.0",
     "postcss": "^8.4.49",
     "postcss-load-config": "^3.1.4",
-    "postcss-safe-parser": "^6.0.0",
+    "postcss-safe-parser": "^7.0.0",
     "postcss-selector-parser": "^7.0.0",
     "semver": "^7.6.3",
     "svelte-eslint-parser": "^1.0.0-0"