Update autoprefixer from 7.2.3 to 7.2.4 in packages/react-scripts

Author: dependencies-bot

packages/react-scripts/package.json

@@ -32,7 +32,7 @@
     "@jetbrains/kotlin-react-dom": "^16.2.0-pre.15",
     "@jetbrains/kotlin-webpack-plugin": "^1.2.1",
     "@jetbrains/ts2kt-automator": "^1.0.8",
-    "autoprefixer": "7.2.3",
+    "autoprefixer": "7.2.4",
     "case-sensitive-paths-webpack-plugin": "2.1.1",
     "chalk": "2.3.0",
     "css-loader": "0.28.7",