fix: Add missing dependencies for types-python-dateutil

[Dor-bl]

Currently, when trying to commit, mypy hook is failing on Library stubs not installed for "dateutil.parser" although they are installed.

(venv) E:\Git\python-client>mypy --python-executable venv\Scripts\python --install-types
Installing missing stub packages:
venv\Scripts\python -m pip install types-python-dateutil

Install? [yN] y

Requirement already satisfied: types-python-dateutil in e:\git\python-client\venv\lib\site-packages (2.8.19.13)

The solution I found, for now, is adding additional_dependencies to mypy .pre-commit hook
See dateutil/dateutil#383 for more info