upgrade to React 16.14.0

Author: VeraDidenko

typescript/package.json

@@ -7,8 +7,8 @@
     "@types/node": "12.12.14",
     "@types/react": "16.9.14",
     "@types/react-dom": "16.9.4",
-    "react": "^16.12.0",
-    "react-dom": "^16.12.0",
+    "react": "^16.14.0",
+    "react-dom": "^16.14.0",
     "react-scripts": "3.2.0",
     "typescript": "3.7.2"
   },