Bump @types/jest from 26.0.20 to 26.0.21 (#84)

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] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "test": "jest"
   },
   "devDependencies": {
-    "@types/jest": "^26.0.20",
+    "@types/jest": "^26.0.21",
     "@typescript-eslint/eslint-plugin": "^4.18.0",
     "eslint": "^7.22.0",
     "eslint-config-tc": "^18.1.0",