fix:Upgrade idna to 1.0.3 to avoid CVE-2024-12224

[mautamu]

Hello, @magiclen!

This PR updates the dependencies to bring idna to 1.0.3 to avoid CVE-2024-12224, resolving #5. In order to also not break CI, I have rolled up PR #6 and ignored the clippy warnings that seemed to be spurious given my reading of the intent of the code. Feel free to revert those specific commits as needed. I will also create a PR for rocket-recaptcha-v3 to pull this downstream. Let me know if any concerns.

Cheers, Mautamu

fixes: #5