build(deps-dev): bump @types/jest from 26.0.20 to 26.0.21 (#98)

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>

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

package.json

@@ -47,7 +47,7 @@
     "@commitlint/cli": "^12.0.1",
     "@commitlint/config-conventional": "^12.0.1",
     "@types/file-loader": "^4.2.0",
-    "@types/jest": "^26.0.15",
+    "@types/jest": "^26.0.21",
     "@types/jest-image-snapshot": "^4.3.0",
     "@types/loader-utils": "^2.0.1",
     "@types/mime": "^2.0.3",