Fix mailto support for CAA 'iodef' (ref: #73)

[LarsArtmann]

#73

[vetal2409]

Hello! Thanks for your contribution!
@LarsArtmann Could you please sign off your commit to pass the DCO check?

[LarsArtmann]

@vetal2409 commits are signed off, DCO passes

[LarsArtmann]

Can somebody merge this?

[kurok]

I will pass it to right person - thank for contribute

[fdrvrtm]

Hi @LarsArtmann,

Thank you for your valuable contribution!

Your changes have been merged directly into the go-namecheap-sdk and are included in the v2.4.0 release of the SDK.

Since this SDK is used within our provider, we have updated its version accordingly, which brings your code changes into our codebase.

For those following this MR and interested in incorporating this fix into their environment, please use the latest version of the provider (currently v2.2.0). This should resolve the issue you've encountered.

If the issue is resolved, we would greatly appreciate your feedback.

Thanks again!

[vetal2409]

@LarsArtmann, Thank you for your contribution. I am very sorry for the late reply. We will work on proper notification.

Changing "vendor" folder isn't a good idea because it is auto-generated and all the manual changes will be lost.
I made this fix in go-namecheap-sdk and updated this terrafrom provider with this new SDK.

Terraform Provider v2.2.0 should work as you expected. Just let us know if you have any issues with it.