message: Updated sigunp request to v9 (lib), closes
diff: @@ -5274,14 +5274,15 @@ error Context::signup(
  user["created_with"] = Formatter::EscapeJSONString(
  HTTPSClient::Config.UserAgent());
  - Json::Value root;
  - root["user"] = user;
  + Json::Value ws;
  + ws["initial_pricing_plan"] = 0;
  +
  + user["workspace"] = ws;
  - // Not implemented in v9 as of 12.05.2017
  HTTPSRequest req;
  req.host = urls::API();
  - req.relative_url = "/api/v8/signups";
  - req.payload = Json::StyledWriter().write(root);
  + req.relative_url = "/api/v9/signup";
  + req.payload = Json::StyledWriter().write(user);
  HTTPSResponse resp = toggl_client->Post(req);
  if (resp.err != noError) {
  