[INFRA] dev - Bump @types/jest from 25.1.4 to 26.0.9 & jest to 26.3.0 (…

…#494)

* [INFRA] dev - Bump @types/jest from 25.1.4 to 26.0.9

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 25.1.4 to 26.0.9.
- [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]>

* Update jest to 26.3.0

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