Bump autoprefixer from 9.8.5 to 9.8.6 (#389)

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.8.5 to 9.8.6.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/master/CHANGELOG.md)
- [Commits](postcss/autoprefixer@9.8.5...9.8.6)

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

package.json

@@ -36,7 +36,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "autoprefixer": "^9.8.5",
+    "autoprefixer": "^9.8.6",
     "chalk": "^4.1.0",
     "cheerio": "^1.0.0-rc.3",
     "cross-env": "^7.0.2",