Replace < with \x3C or \u003C in JSON strings.

[mpkorstanje]

🤔 What's the problem you're trying to solve?

Writing json in script tags is complicated.

✨ What's your proposed solution?

Replace < with \x3C or \u003C in JSON strings as per 4.12.1.3 Restrictions for contents of script elements.

⛏ Have you considered any alternatives or workarounds?

No response

📚 Any additional context?

No response

[mpkorstanje]

Fixed by #408