Bump @types/jest from 24.0.20 to 24.0.21 in /src/FilterLists.Web

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 24.0.20 to 24.0.21.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest)

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

src/FilterLists.Web/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "@types/jest": "^24.0.20",
+    "@types/jest": "^24.0.21",
     "@types/node": "^12.11.7",
     "@types/react": "^16.9.11",
     "@types/react-dom": "^16.9.3",