Cannot use `unsafe_text` in <style>-Tags

[ds82]

To write proper inline css I think it should be possible to use unsafe_text in <style>-Tags. To produce something like this:

<style>
body { font-family: 'Fira Code'; }
</style>

If you agree I could open a PR ( -> https://github.com/ds82/axohtml/commits/fix/allow_unsafe_text_in_style )