Bump whatwg-fetch from 3.0.0 to 3.6.2

Bumps [whatwg-fetch](https://github.com/github/fetch) from 3.0.0 to 3.6.2.
- [Release notes](https://github.com/github/fetch/releases)
- [Commits](JakeChampion/fetch@v3.0.0...v3.6.2)

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

Author: dependabot-preview[bot]

package.json

@@ -18,7 +18,7 @@
     "redux-logger": "3.0.6",
     "redux-thunk": "2.3.0",
     "style-loader": "1.2.1",
-    "whatwg-fetch": "3.0.0"
+    "whatwg-fetch": "3.6.2"
   },
   "devDependencies": {
     "@babel/core": "7.11.5",