Recaptcha allow to change to dark theme

[miguelt1]

Add a prop to allow to change recaptcha theme

[Pyrax]

Thanks for the suggestion. I'll add it in a moment.

[github-actions]

🎉 This issue has been resolved in version 1.3.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[Pyrax]

Can now be used like <Recaptcha siteKey="..." theme="dark" />.
Actually, any props can be passed down to react-google-recaptcha.