Support TypedLiterals in get_parameters

[Khrol]

Thanks for contributing!

Before submitting your pull request please have a look at the following checklist:

• [x] ran the tests (pytest)
• [ ] all style issues addressed (flake8)
• [x] your changes are covered by tests
• [ ] your changes are documented, if needed

In addition, please take care to provide a proper description on what your change does, fixes or achieves when submitting the pull request.

[Khrol]

Flake8 is failing for me locally but in the places I haven't touched.