Remove unnecessary new allocation

[AgusMarquezUala]

aws-signature-version-4/src/AwsSignatureHandler.cs

Line 27 in b8e5480

new KeyValuePair<string, IEnumerable<string>>[0];

new KeyValuePair<string, IEnumerable>[0] => Array.Empty<KeyValuePair<string, IEnumerable>>()

[github-actions]

Hi there and welcome to this repository!

A maintainer will be with you shortly, but first and foremost I would like to thank you for taking the time to report this issue. Quality is of the highest priority for us, and we would never release anything with known defects. We aim to do our best but unfortunately you are here because you encountered something we didn't expect. Lets see if we can figure out what went wrong and provide a remedy for it.

[FantasticFiasco]

Hi @AgusMarquezUala! Thanks for reporting the issue, I'll look into it!

[FantasticFiasco]

The v4.0.1 version has now been released on nuget.org. Thanks for your letting me know of the issue!