chore(deps): update dependency deepl to v1.16.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
deepl	1.15.0 -> 1.16.0

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Release Notes

DeepLcom/deepl-python (deepl)

v1.16.0

Compare Source

Added

• Add optional context parameter for text translation, that specifies
  additional context to influence translations, that is not translated itself.

Changed

• Added notice in Readme that starting in 2024 the library will drop support for
  Python versions that are officially end-of-life.
• DeepL API calls now send requests with JSON-encoded bodies where possible.

Fixed

• Catch failures while constructing the user agent string.
• Added py.typed to the package so that our package is typed for our users.
• Fixed most type errors in the package.

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