Add author and date in the article (wallabag 2.3.0)

[ngosang]

In Wallabag 2.3.0 author and publication date are available. Please show them in the app.

[silberzwiebel]

If I understood the app code correctly, it is using this API wrapper written by @di72nn. So, first the API wrapper needs to have these new fields, then one can add this to the app (which shouldn't be that hard).

[xfilesee]

This is still an issue. Is it hard to fix?

[di72nn]

Done.