fix: NPE when using null values within InstantStateManager

Author: isXander

src/main/java/dev/isxander/yacl3/impl/InstantStateManager.java

@@ -3,6 +3,8 @@
 import dev.isxander.yacl3.api.Binding;
 import dev.isxander.yacl3.api.StateManager;
 
+import java.util.Objects;
+
 public class InstantStateManager<T> implements StateManager<T>, ProvidesBindingForDeprecation<T> {
     private final Binding<T> binding;
     private StateListener<T> stateListener;
@@ -14,7 +16,7 @@ public InstantStateManager(Binding<T> binding) {
 
     @Override
     public void set(T value) {
-        boolean changed = !this.get().equals(value);
+        boolean changed = !Objects.equals(this.get(), value);
 
         this.binding.setValue(value);