Bump @types/jest from 26.0.20 to 26.0.21

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 26.0.20 to 26.0.21.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest)

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

package.json

@@ -24,7 +24,7 @@
     "@testing-library/jest-dom": "^5.11.9",
     "@testing-library/react": "^11.2.5",
     "@types/express": "^4.17.11",
-    "@types/jest": "^26.0.20",
+    "@types/jest": "^26.0.21",
     "@types/morgan": "^1.9.2",
     "@types/node": "^14.14.35",
     "@types/react": "^17.0.3",