Add latest test profile

pom.xml

@@ -483,6 +483,24 @@
             </build>
         </profile>
 
+        <profile>
+            <id>latest</id>
+            <repositories>
+                <repository>
+                    <id>paper-repo</id>
+                    <url>https://papermc.io/repo/repository/maven-public/</url>
+                </repository>
+            </repositories>
+            <dependencies>
+                <dependency>
+                    <groupId>com.destroystokyo.paper</groupId>
+                    <artifactId>paper-api</artifactId>
+                    <version>1.16.1-R0.1-SNAPSHOT</version>
+                    <scope>provided</scope>
+                </dependency>
+            </dependencies>
+        </profile>
+
         <profile>
             <id>static_build_number</id>
             <activation>

src/main/java/com/Acrobot/ChestShop/Containers/AdminInventory.java

@@ -42,7 +42,6 @@ public class AdminInventory implements Inventory {
         maxStackSize = i;
     }
 
-    @Override
     public String getName() {
         return "Admin inventory";
     }
@@ -211,7 +210,6 @@ public class AdminInventory implements Inventory {
         return new ArrayList<>();
     }
 
-    @Override
     public String getTitle() {
         return "Admin inventory";
     }
@@ -226,6 +224,10 @@ public class AdminInventory implements Inventory {
         return null;
     }
 
+    public InventoryHolder getHolder(boolean useSnapshot) {
+        return null;
+    }
+
     @Override
     public ListIterator<ItemStack> iterator() {
         return Arrays.asList(content).listIterator();

src/main/java/com/Acrobot/ChestShop/Listeners/Player/PlayerInteract.java

@@ -73,7 +73,7 @@ public class PlayerInteract implements Listener {
             return;
         }
 
-        if (!isSign(block) || player.getInventory().getItemInMainHand().getType() == Material.SIGN) // Blocking accidental sign edition
+        if (!isSign(block) || player.getInventory().getItemInMainHand().getType().name().contains("SIGN")) // Blocking accidental sign edition
             return;
 
         Sign sign = (Sign) block.getState();