Update dependency react-scripts to v5

Author: renovate[bot]

app/package.json

@@ -9,7 +9,7 @@
   },
   "devDependencies": {
     "prettier": "^1.1.0",
-    "react-scripts": "0.9.5"
+    "react-scripts": "5.0.1"
   },
   "scripts": {
     "start": "react-scripts start",