moved from Catch to doctest for unit tests

test/src/unit-constructor1.cpp

@@ -27,16 +27,18 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 
-#include "catch.hpp"
+#include "doctest_compatibility.h"
 
 #define private public
 #include <nlohmann/json.hpp>
 using nlohmann::json;
+#undef private
 
 #include <deque>
 #include <forward_list>
 #include <fstream>
 #include <list>
+#include <set>
 #include <unordered_map>
 #include <unordered_set>
 #include <valarray>