deps: update dependency typing-extensions to v4.3.0 (#307)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [typing-extensions](https://togithub.com/python/typing_extensions) ([changelog](https://togithub.com/python/typing_extensions/blob/main/CHANGELOG.md)) | `==4.1.1` -> `==4.3.0` | [![age](https://badges.renovateapi.com/packages/pypi/typing-extensions/4.3.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/typing-extensions/4.3.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/typing-extensions/4.3.0/compatibility-slim/4.1.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/typing-extensions/4.3.0/confidence-slim/4.1.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>python/typing_extensions</summary>

### [`v4.3.0`](https://togithub.com/python/typing_extensions/blob/HEAD/CHANGELOG.md#Release-430-July-1-2022)

[Compare Source](https://togithub.com/python/typing_extensions/compare/4.2.0...4.3.0)

-   Add `typing_extensions.NamedTuple`, allowing for generic `NamedTuple`s on
    Python <3.11 (backport from [python/cpython#&#8203;92027](https://togithub.com/python/cpython/issues/92027), by Serhiy Storchaka). Patch
    by Alex Waygood ([@&#8203;AlexWaygood](https://togithub.com/AlexWaygood)).
-   Adjust `typing_extensions.TypedDict` to allow for generic `TypedDict`s on
    Python <3.11 (backport from [python/cpython#&#8203;27663](https://togithub.com/python/cpython/issues/27663), by Samodya Abey). Patch by
    Alex Waygood ([@&#8203;AlexWaygood](https://togithub.com/AlexWaygood)).

### [`v4.2.0`](https://togithub.com/python/typing_extensions/blob/HEAD/CHANGELOG.md#Release-420-April-17-2022)

[Compare Source](https://togithub.com/python/typing_extensions/compare/4.1.1...4.2.0)

-   Re-export `typing.Unpack` and `typing.TypeVarTuple` on Python 3.11.
-   Add `ParamSpecArgs` and `ParamSpecKwargs` to `__all__`.
-   Improve "accepts only single type" error messages.
-   Improve the distributed package. Patch by Marc Mueller ([@&#8203;cdce8p](https://togithub.com/cdce8p)).
-   Update `typing_extensions.dataclass_transform` to rename the
    `field_descriptors` parameter to `field_specifiers` and accept
    arbitrary keyword arguments.
-   Add `typing_extensions.get_overloads` and
    `typing_extensions.clear_overloads`, and add registry support to
    `typing_extensions.overload`. Backport from [python/cpython#&#8203;89263](https://togithub.com/python/cpython/issues/89263).
-   Add `typing_extensions.assert_type`. Backport from bpo-46480.
-   Drop support for Python 3.6. Original patch by Adam Turner ([@&#8203;AA-Turner](https://togithub.com/AA-Turner)).

</details>

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