- A few users had noticed they get weird content in their excerpts when using e.g. an html block with an iframe
- This use case is common for people embedding podcasts at the top of their posts
refs https://github.com/TryGhost/Toolbox/issues/363
- this shared library is standalone, and it used in various places of
Ghost core, so we can pull it out to keep it easier to reason about
- we also use the `html-to-text` dependency in another package but it's
outdated and could now switch to this new package
