PATCH Method not supported as entrance to UrlExpression builder

[ecarlson94]

The following cannot be used:

return run(_ =>
{
    _.Patch.Url("/querystring2?test=value&foo=bar");
    _.Patch.Json(new {});
});

The following must instead be used:

return run(_ =>
{
    _.Configure = context => context.HttpMethod("PATCH");
    var urlExpression = (IUrlExpression)_
    _.urlExpression.Url("/querystring2?test=value&foo=bar");
    _.urlExpression.Json(new {});
});