Update config.yaml

[policybot2020]

@SarahWagner

I have finished mapping the 16 sources into the Yaml config file. In addition, I have updated the DB mapping with an extra field called "author" , maybe this is the wrong place to add. Please advise, if it's false.

Jian

[SarahWagner]

The field "author" is not present as "author" in any of the feeds. I've seen it in a couple, but it's called differently.
We can leave it but it will be empty without mapping beforehand. Also there are still 404 pages in the list of feeds (https://www.telesurenglish.net/pages/rss.html, https://www.news24.com/World/Rss). @policybot2020 Can you please check and fix?

@arunge We will need to make a mapping to normalize the field names. For example the article text is not always called the same, this might also apply to other fields.

[SarahWagner]

Please check the feeds to be valid and not causing 404 errors.