Update the dataset of known news websites

[jonathanmayer]

We're especially light on online-only and online-first publications. Some possible sources...

• https://aws.amazon.com/awis/
• https://www.webshrinker.com/
• https://www.newsguardtech.com/
• https://mediabiasfactcheck.com/
• https://www.allyoucanread.com/
• https://nuzzel.com/rank
• http://media-rank.com/ (note: possible data quality issues)
• https://en.wikipedia.org/wiki/Category:American_news_websites
• https://newsapi.org/
• http://www.abyznewslinks.com/
• https://docs.microsoft.com/en-us/rest/api/cognitiveservices-bingsearch/bing-news-api-v7-reference
• https://contextualweb.io/news-api/
• https://aylien.com/news-api/
• https://webhose.io/products/news-feeds/
• http://eventregistry.org/
• https://developers.peakm.com/
• https://www.newsguardtech.com/
• https://newslit.co/ (formerly Nuzzel)
• https://auditedmedia.com/about/who-we-are/clients

[jonathanmayer]

Closing this out. @benjaminhkaiser has been on top of maintaining our website datasets.