Add zh-hant to OpenAPI spec for text translation

[mike-winters-deepl]

@daniel-jones-dev FYI, I also added the separate TargetLanguagesText list to the openapi_gitbook file.

[JanEbbing]

Not approving yet because of my TargetLanguage question, rest LGTM

[daniel-jones-dev]

LGTM. We should bump the minor version number up. Can you do this Mike?

[mike-winters-deepl]

LGTM. We should bump the minor version number up. Can you do this Mike?

@daniel-jones-dev just bumped to 3.0.4, let me know if all looks as you expect it to and I can go ahead and merge!

[daniel-jones-dev]

LGTM. We should bump the minor version number up. Can you do this Mike?

@daniel-jones-dev just bumped to 3.0.4, let me know if all looks as you expect it to and I can go ahead and merge!

Hmmm that is the wrong version number. 3.0.3 here is the OpenAPI specification version (i.e. what fields should be present in the openapi.* files).
The 2.15.0 here is the DeepL API version i.e. reflecting how the API behaviour is changing.

Lastly, a minor version bump means the second number, i.e. the next version would be 2.16.0.

Edit: Sorry this is not clear; we need to add some developer documentation to the project.

[mike-winters-deepl]

@daniel-jones-dev sorry, my mistake! Just pushed what should be a fix.

[daniel-jones-dev]

I forgot to mention: when bumping the version number, it's important to update the changelog too -- I've just done that.