Update autoprefixer from 8.2.0 to 8.3.0 in packages/react-scripts

Author: dependencies-bot

packages/react-scripts/package.json

@@ -32,7 +32,7 @@
     "@jetbrains/kotlin-react-dom": "^16.2.1-pre.22",
     "@jetbrains/kotlin-webpack-plugin": "^1.2.5",
     "@jetbrains/ts2kt-automator": "^1.0.10",
-    "autoprefixer": "8.2.0",
+    "autoprefixer": "8.3.0",
     "case-sensitive-paths-webpack-plugin": "2.1.2",
     "chalk": "2.3.2",
     "css-loader": "0.28.11",