case issue: keypair vs keyPair

[jdutchak]

in web5.js the key pair param is lower case "keypair"

in dwn-sdk-js the param is keyPair - camelCase - when trying to createSignatureInput or ProtocolsConfigure.create this becomes an issue and it appears the key method doesn't include like the "alg" param like the ion method.

suggest ensuring case is same from dwn-sdk-js or ssi -> other projects (preferred camelCase in this scenario)