Update dependency autoprefixer to v9.8.0

Author: renovate-bot

package.json

@@ -121,7 +121,7 @@
 "@types/prop-types": "15.7.1",
 "@types/react": "16.8.20",
 "@types/react-transition-group": "2.9.2",
-"autoprefixer": "9.6.1",
+"autoprefixer": "9.8.0",
 "babel-eslint": "10.0.2",
 "babel-jest": "24.8.0",
 "babel-loader": "8.0.6",