Deps: Update deepl requirement from ~=1.16.1 to >=1.16.1,<1.22.0

[dependabot]

Updates the requirements on deepl to permit the latest version.

Release notes

Sourced from deepl's releases.

v1.21.0

Added

• Added support for the Write API in the client library, the implementation can be found in the DeepLClient class. Please refer to the README for usage instructions.

Changed

• The main functionality of the library is now also exposed via the DeepLClient class. Please change your code to use this over the Translator class whenever convenient.

Changelog

Sourced from deepl's changelog.

[1.21.0] - 2025-01-15

Added

• Added support for the Write API in the client library, the implementation can be found in the DeepLClient class. Please refer to the README for usage instructions.

Changed

• The main functionality of the library is now also exposed via the DeepLClient class. Please change your code to use this over the Translator class whenever convenient.

[1.20.0] - 2024-11-15

Added

• Added model_type option to translate_text() to use models with higher translation quality (available for some language pairs), or better latency. Options are 'quality_optimized', 'latency_optimized', and 'prefer_quality_optimized'
• Added the model_type_used field to translate_text() response, that indicates the translation model used when the model_type option is specified.

[1.19.1] - 2024-09-17

Fixed

• Fixed typing issues, black-formatting and a test case failure.

[1.19.0] - 2024-09-17

Added

• Added billed_characters to response from translate_text().

[1.18.0] - 2024-04-26

Added

• New language available: Arabic ('ar'). Add language code constants and tests. Arabic is currently supported only for text translation; document translation support for Arabic is coming soon.

  Note: older library versions also support the new language, this update only adds new code constants.

• Added a section in the readme on how to configure retry options in http_client.py

[1.17.0] - 2024-02-06

Added

• Added output_format parameter for document upload function, that indicates the file extension of the desired file format for the translated document.
• Added basic usage example of the library

Fixed

• Fixed typechecking errors when using mypy's strict mode
  • Thanks to derlikh-smart and vad for the report in #82

... (truncated)

Commits

• ddaef45 docs: Increase version to 1.21.0
• 23f0cf1 fix: Fix the CLI to use the new DeepLClient
• 842015c docs: Update changelog and README with the Write API
• 505c8d2 tests: Add style test
• 1904841 tests: Add basic write API test
• c512702 feat: Add style and tones to write API
• 4107220 feat: Add DeepLClient class for write implementation
• 43120f1 docs: Increase version to 1.20.0
• b23a5eb docs: changelog
• e13b8dd fix[CLI]: always include model_type in API request for show-model-type-used o...
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