Bump @types/bull from 3.14.0 to 3.14.4

Bumps [@types/bull](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/bull) from 3.14.0 to 3.14.4.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/bull

)

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