fix: empty style tag no longer throws error

[willtonkin]

if <p style="" /> were to be parsed this invalid style prop would reach React and an error would be thrown, stopping rehydration

[willtonkin]

• [x] I need to rebase this using a different email address
• [x] CI failed, I'll look into it

[willtonkin]

For some more context, I wrote a test here, specifically here that this PR should resolve.

There's additional changes as well that I was looking at in that branch, which may or may not be useful :)

[willtonkin]

35 will need to be resolved first before CI will pass

[simon360]

You're doing the Lord's work, @willtonkin. May all devs bow down before you.

(Should work on a rebase)

[willtonkin]

Rebased, back to you @simon360 if you'd like to merge