Bump whatwg-fetch from 3.3.1 to 3.4.0

Bumps [whatwg-fetch](https://github.com/github/fetch) from 3.3.1 to 3.4.0.
- [Release notes](https://github.com/github/fetch/releases)
- [Commits](https://github.com/github/fetch/compare/v3.3.1...v3.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -80,7 +80,7 @@
     "sortablejs": "^1.10.2",
     "swiper": "^5.4.5",
     "webcomponents.js": "^0.7.24",
-    "whatwg-fetch": "^3.3.1"
+    "whatwg-fetch": "^3.4.0"
   },
   "babel": {
     "presets": [