fix: Spirit trade recipe crash

Closes #1169

The crash did not repro in dev, but in prod. May be due to different behaviours of the JBR I am using? Not sure.
But ensuring a modifyable list fixes it.

gradle.properties

@@ -14,7 +14,7 @@ minecraft_version_range=[1.21,1.22)
 
 ## Neo
 # The neo version must agree with the Minecraft version to get a valid artifact
-neo_version=21.0.114-beta
+neo_version=21.0.135-beta
 # The neo version range can use any version of neo as bounds or match the loader version range
 neo_version_range=[21.0.110-beta,)
 # The loader version range can only use the major version of Neo/FML as bounds

src/main/java/com/klikli_dev/occultism/crafting/recipe/SpiritTradeRecipe.java

@@ -108,7 +108,9 @@ public boolean isValid(ItemStack... input) {
 
     public boolean isValid(List<ItemStack> input) {
         //deep copy, otherwise stack.shrink will eat original input.
-        List<ItemStack> cached = input.stream().map(ItemStack::copy).toList();
+        //we use collect(collectors.toList), because toList() would return an unmodifiable list
+        //noinspection SimplifyStreamApiCallChains
+        List<ItemStack> cached = input.stream().map(ItemStack::copy).collect(Collectors.toList());
         for (Ingredient ingredient : this.getIngredients()) {
             boolean matched = false;
             for (Iterator<ItemStack> it = cached.iterator(); it.hasNext(); ) {