upgraded yarn deps

Author: atkawa7

httpsnippet-demo/redoc/package.json

@@ -3,12 +3,13 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "mobx": "^4.2.0",
-    "react": "^16.8.3",
-    "react-dom": "^16.8.4",
+    "core-js": "^3.6.5",
+    "mobx": "^5.15.4",
+    "react": "^16.13.1",
+    "react-dom": "^16.13.1",
     "react-scripts": "2.1.5",
-    "redoc": "^2.0.0-rc.4",
-    "styled-components": "^4.1.3"
+    "redoc": "^2.0.0-rc.31",
+    "styled-components": "^5.1.1"
   },
   "scripts": {
     "start": "react-scripts start",