Can't add schema to <head> #28

Describe the bug
A clear and concise description of what the bug is.

To Reproduce

1. Use Next.js stack with react-helmet
2. Wrap <Helmet> around <JSONLD> (or <Head> from next/head for no result)
3. Error: You may be attempting to nest <Helmet> components within each other, which is not allowed. Refer to our API for more information.

Expected behavior
I'd like to add the schema to my