The Aliases in GitReleaseManager should provide overloads for not passing in Settings

[gep13]

There are several aliases within the GitReleaseManager Tool that don't require anything other than the mandatory parameters.

When using these aliases, you have to do something like this in your build.cake file:

    GitReleaseManagerPublish(userName, password, "gep13", "readthedocs-vscode", version, new GitReleaseManagerPublishSettings {
    });

We should provide additional aliases as an overload, so that this can be executed as follows:

    GitReleaseManagerPublish(userName, password, "gep13", "readthedocs-vscode", version);