build(deps-dev): bump @types/jest from 26.0.19 to 26.0.20 (#528)

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 26.0.19 to 26.0.20.
- [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

@@ -55,7 +55,7 @@
   },
   "devDependencies": {
     "@types/debug": "4.1.5",
-    "@types/jest": "26.0.19",
+    "@types/jest": "26.0.20",
     "@types/jest-dev-server": "4.2.0",
     "@types/node": "14.14.20",
     "@types/rimraf": "^3.0.0",