Adds egggroups

PkmnLib.Dataloader/SpeciesDataLoader.cs

@@ -55,7 +55,7 @@ public static class SpeciesDataLoader
 
         var species = new SpeciesImpl(serialized.Id, serialized.Species, genderRate, serialized.GrowthRate,
             serialized.CatchRate, serialized.BaseHappiness, forms,
-            serialized.Flags.Select(x => new StringKey(x)).ToImmutableHashSet(), evolutions);
+            serialized.Flags.Select(x => new StringKey(x)), evolutions, serialized.EggGroups.Select(x => (StringKey)x));
         return species;
     }