Bump postcss from 8.2.6 to 8.2.8 (#5)

Bumps [postcss](https://github.com/postcss/postcss) from 8.2.6 to 8.2.8.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.2.6...8.2.8)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -23,7 +23,7 @@
         "axios": "^0.21",
         "laravel-mix": "^6.0.6",
         "lodash": "^4.17.19",
-        "postcss": "^8.2.1",
+        "postcss": "^8.2.8",
         "postcss-import": "^12.0.1",
         "tailwindcss": "^2.0.1"
     }