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

Author: renovate[bot]

package.json

@@ -75,7 +75,7 @@
     "known-css-properties": "^0.29.0",
     "postcss": "^8.4.35",
     "postcss-load-config": "^3.1.4",
-    "postcss-safe-parser": "^6.0.0",
+    "postcss-safe-parser": "^7.0.0",
     "postcss-selector-parser": "^6.0.15",
     "semver": "^7.6.0",
     "svelte-eslint-parser": ">=0.34.0-next.10 <1.0.0"