message: Simplify use of Dictionary::get
diff: @@ -80,7 +80,7 @@ void TechnologyCatalog::readCategories(NAS2D::Xml::XmlElement& node)
  for (auto category = &node; category; category = category->nextSiblingElement())
  {
  const auto attributes = NAS2D::attributesToDictionary(*category);
  - const std::string name = attributes.get<std::string>("name");
  + const std::string name = attributes.get("name");
  auto it = mCategories.find(name);
  if (it != mCategories.end())
  