Use react 17.0.2 - most recent LTS

Author: MarkEWaite

package.json

@@ -3,8 +3,8 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "react": "^16.0.0",
-    "react-dom": "^16.0.0",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2",
     "react-scripts": "^4.0.3"
   },
   "scripts": {