Bump version to 5.1.15 for release

I noticed this was a problem the first update and have been forgetting and then manually fixing it on Bukkit since. A travesty.

.github/workflows/draft_release.yml

@@ -27,7 +27,7 @@ jobs:
           name: OpenInv ${{ env.VERSIONED_NAME }}
           body: |-
             ## Supported server versions
-            **Paper:** TODO VERSION, 1.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.1
+            **Paper:** TODO VERSION, 1.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.1  
             **Spigot:** TODO VERSION
             
             TODO HELLO HUMAN, PRESS THE GENERATE CHANGELOG BUTTON PLEASE.

gradle.properties

@@ -1,6 +1,6 @@
 # Project meta
 group=com.lishid.openinv
-version=5.1.14
+version=5.1.15
 description=A Bukkit plugin for opening normally-inaccessible inventories.
 
 # Gradle configuration

internal/spigot/src/main/java/com/lishid/openinv/internal/reobf/container/bukkit/OpenPlayerInventory.java

@@ -1,7 +1,7 @@
 package com.lishid.openinv.internal.reobf.container.bukkit;
 
 import com.google.common.base.Preconditions;
-import com.lishid.openinv.internal.reobf.container.OpenInventory;
+import com.lishid.openinv.internal.reobf.container.BaseOpenInventory;
 import net.minecraft.core.NonNullList;
 import net.minecraft.world.entity.player.Inventory;
 import org.bukkit.craftbukkit.v1_21_R6.inventory.CraftInventory;
@@ -15,13 +15,13 @@ import org.jetbrains.annotations.Nullable;
 
 public class OpenPlayerInventory extends CraftInventory implements PlayerInventory {
 
-  public OpenPlayerInventory(@NotNull OpenInventory inventory) {
+  public OpenPlayerInventory(@NotNull BaseOpenInventory inventory) {
     super(inventory);
   }
 
   @Override
-  public @NotNull OpenInventory getInventory() {
-    return (OpenInventory) super.getInventory();
+  public @NotNull BaseOpenInventory getInventory() {
+    return (BaseOpenInventory) super.getInventory();
   }
 
   @Override