Adds getter for UniqueIdentifier

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

tests/LibraryTests/SpeciesTest.cpp

@@ -0,0 +1,15 @@
+#ifdef TESTS_BUILD
+
+#include "../../extern/catch.hpp"
+#include "../../src/Library/CreatureData/CreatureSpecies.hpp"
+
+using namespace CreatureLib::Library;
+
+TEST_CASE("Set Variant", "[Library]") {
+    auto defaultVariant = new SpeciesVariant("default", 0, 0, 0, {0, 1}, StatisticSet<uint16_t>(), {}, {}, nullptr);
+    auto c = CreatureSpecies(0, "foo", defaultVariant, 0, "", 0);
+    auto secondVariant = new SpeciesVariant("second", 0, 0, 0, {0, 1}, StatisticSet<uint16_t>(), {}, {}, nullptr);
+    c.SetVariant("second"_cnc, secondVariant);
+}
+
+#endif