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>

Author: dependabot[bot]

package-lock.json

@@ -28,7 +28,7 @@
   },
   "devDependencies": {
     "@aws-cdk/assert": "1.87.1",
-    "@types/jest": "^26.0.20",
+    "@types/jest": "^26.0.21",
     "@types/node": "^14.14.35",
     "aws-cdk": "1.87.1",
     "detect-secrets": "^1.0.6",