chore(react-scripts): downgrade to 3.4.0

version 3.4.1 has a bug see: facebook/create-react-app#8689

Author: Gerard Brull

package.json

@@ -87,7 +87,7 @@
     "react": "16.13.1",
     "react-docgen-typescript": "1.16.3",
     "react-dom": "16.13.1",
-    "react-scripts": "^3.4.1",
+    "react-scripts": "3.4.0",
     "react-styleguidist": "^11.0.5",
     "react-test-renderer": "16.13.1",
     "rollup": "^2.7.5",