Update dependency autoprefixer to v9.8.0

Author: renovate-bot

package.json

@@ -62,7 +62,7 @@
     "@hot-loader/react-dom": "16.13.0",
     "@percy/storybook": "3.3.0",
     "@storybook/react": "5.3.18",
-    "autoprefixer": "9.7.6",
+    "autoprefixer": "9.8.0",
     "babel-eslint": "10.1.0",
     "babel-jest": "26.0.1",
     "babel-loader": "8.1.0",