Improve a bit tinymce detection (#2155)

* Improve a bit tinymce detection

- Add a `script` pattern
- Add a way to get the major version

This can be tested [here](https://www.mediapart.fr/journal/france/080318/mandelieu-un-promoteur-vendeur-d-armes-en-affaire-avec-la-famille-du-maire)

* Add a missing part in a regexp, spotted by @gadcam