breaks if you use this with bitcore-lib-cash #31
Description
If you use this with bitcore-lib-cash you will get issues when trying to sign.
In particular
throw new errors.InvalidArgument(argumentName, message, docsPath);
^
Invalid Argument: First argument should be an instance of PrivateKey
This is because bitcore-message requires bitcore-lib not bitcore-lib-cash as a dependency. Thus they reference a different instance of PrivateKey
Simple fix is to change the bitcore-lib dependency to bitcore-lib-cash to proceed.
Just a pain if you run npm update/install, you will have to change this back each time.