Upgrade to React 17

This release makes some core changes to react, but shouldn't require
many code changes on our side.
https://reactjs.org/blog/2020/10/20/react-v17.html

package.json

@@ -5,15 +5,14 @@
   "dependencies": {
     "bootstrap": "^5.2.2",
     "enzyme": "^3.11.0",
-    "enzyme-adapter-react-16": "^1.15.6",
     "font-awesome": "^4.7.0",
     "i18next": "^21.5.2",
     "i18next-browser-languagedetector": "^6.1.2",
     "i18next-http-backend": "^1.3.1",
-    "react": "^16.14.0",
-    "react-bootstrap": "^2.5.0",
-    "react-dom": "^16.14.0",
-    "react-i18next": "^11.14.2",
+    "react": "^17.0.0",
+    "react-bootstrap": "^2.7.0",
+    "react-dom": "^17.0.0",
+    "react-i18next": "^12.0.0",
     "react-id-swiper": "^4.0.0",
     "react-router-dom": "^5.1.2",
     "react-scripts": "5.0.1",