Fix security vulnerabilities in playgrounds (#81)

* Fix vue vulnerabilities

* Fix vulnerabilities for react

* Fix react vulnerabilities

Author: curquiza

playgrounds/react/package.json

@@ -7,7 +7,7 @@
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-instantsearch-dom": "^6.7.0",
-    "react-scripts": "3.4.1"
+    "react-scripts": "^3.4.3"
   },
   "scripts": {
     "start": "react-scripts start",