More recipe fixes

Author: calmilamsy

station-recipes-v0/src/main/java/net/modificationstation/stationapi/impl/recipe/StationShapedRecipe.java

@@ -81,7 +81,7 @@ public int getSize() {
 
     @Override
     public ItemStack getOutput() {
-        return output;
+        return output.copy();
     }
 
     @Override

station-recipes-v0/src/main/java/net/modificationstation/stationapi/impl/recipe/StationShapelessRecipe.java

@@ -18,7 +18,7 @@ public class StationShapelessRecipe implements CraftingRecipe, StationRecipe {
 
     private final Either<TagKey<Item>, ItemStack>[] ingredients;
     public final ItemStack output;
-    public final BitSet matchedIngredients;
+    private final BitSet matchedIngredients;
 
     public StationShapelessRecipe(ItemStack output, Either<TagKey<Item>, ItemStack>[] ingredients) {
         this.ingredients = ingredients;
@@ -75,7 +75,7 @@ public int getSize() {
 
     @Override
     public ItemStack getOutput() {
-        return output;
+        return output.copy();
     }
 
     @Override