Added
- `isProbablyReaderable` [can now take an optional options object](https://github.com/mozilla/readability/pull/634) to configure it,
allowing you to specify the minimum content length, minimum score, and how to
check if nodes are visible.
- Better support for [deeply-nested content](https://github.com/mozilla/readability/pull/611).
- Readability is now more likely to [keep tables of content](https://github.com/mozilla/readability/pull/646).
- Better support for [content in `<code>` tags](https://github.com/mozilla/readability/pull/647).
- Readability (finally) no longer [throws away all `<h1>` tags](https://github.com/mozilla/readability/pull/650).
Changed
- JSON-LD [support for multiple authors](https://github.com/mozilla/readability/pull/618)
was improved.
- Elements with roles `menu`, `menubar`, `complementary`, `navigation`, `alert`,
`alertdialog`, `dialog` will [all be removed](https://github.com/mozilla/readability/pull/619).