Bump postcss from 7.0.35 to 8.2.10

Bumps [postcss](https://github.com/postcss/postcss) from 7.0.35 to 8.2.10.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/7.0.35...8.2.10)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -73,7 +73,7 @@
     "osm-auth": "^1.0.2",
     "osmtogeojson": "^3.0.0-beta.4",
     "parcel": "^1.2.4",
-    "postcss": "^7.0.35",
+    "postcss": "^8.2.10",
     "prompt-sync": "^4.2.0",
     "sharp": "^0.27.0",
     "slick-carousel": "^1.8.1",