fix hand skins not activating without meta

WeaponMechanics/src/main/java/me/deecaad/weaponmechanics/weapon/skin/RelativeSkinSelector.java

@@ -77,7 +77,8 @@ public void apply(@NotNull ItemStack weapon, @Nullable String skin, @Nullable Sk
 
         // Ideally this will never be true, but sometimes we try to apply skins
         // to AIR which causes errors.
-        if (!weapon.hasItemMeta())
+        ItemMeta meta = weapon.getItemMeta();
+        if (meta == null)
             return;
 
         // We set these to null because we must skip them. base is always
@@ -106,7 +107,12 @@ public void apply(@NotNull ItemStack weapon, @Nullable String skin, @Nullable Sk
         if (base.hasType() && weapon.getType() != base.getType())
             weapon.setType(base.getType());
 
-        ItemMeta meta = weapon.getItemMeta();
+        meta = weapon.getItemMeta();
+        if (meta == null) {
+            WeaponMechanics.debug.error("Item w/ skin suddenly lost metadata... Did you redefine item type to AIR?");
+            return;
+        }
+
         meta.setCustomModelData(customModelData);
         weapon.setItemMeta(meta);
     }

gradle.properties

@@ -1,6 +1,6 @@
 # Versions of the 2 plugins stored in this repo.
 mechanicsCoreVersion=3.5.2
-weaponMechanicsVersion=3.5.3
+weaponMechanicsVersion=3.5.4
 
 # Version of the resource pack
 resourcePackVersion=2.1.2