Added SuppressWarnings for all ItemStack deprecations due to paper

eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/command/CommandDebug.java

@@ -25,7 +25,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 
-@SuppressWarnings("unchecked")
+@SuppressWarnings({"unchecked", "deprecation"})
 public class CommandDebug extends Subcommand {
     /**
      * Instantiate a new /ecoenchants debug command handler.

eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/itemtypes/Spell.java

@@ -37,6 +37,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
 
+@SuppressWarnings("deprecation")
 public abstract class Spell extends EcoEnchant {
     /**
      * Items that must be left-clicked to activate spells for.

eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/support/merging/anvil/AnvilMerge.java

@@ -22,6 +22,7 @@ import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
+@SuppressWarnings("deprecation")
 @UtilityClass
 public class AnvilMerge {
     /**

eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/support/obtaining/LootPopulator.java

@@ -27,6 +27,7 @@ import java.util.Map;
 import java.util.Random;
 import java.util.concurrent.atomic.AtomicBoolean;
 
+@SuppressWarnings("deprecation")
 public class LootPopulator extends BlockPopulator {
     /**
      * Instance of ecoenchants.

eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/util/ItemConversions.java

@@ -32,6 +32,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 
+@SuppressWarnings("deprecation")
 public class ItemConversions extends PluginDependent<EcoPlugin> implements Listener {
     /**
      * Pass an {@link EcoPlugin} in order to interface with it.