revert clonable change

Signed-off-by: Kavindu Dodanduwa <kavindudodanduwa@gmail.com>

Author: Kavindu-Dodan

src/main/java/dev/openfeature/sdk/ImmutableStructure.java

@@ -40,7 +40,7 @@ public ImmutableStructure(Map<String, Value> attributes) {
                 .collect(HashMap::new,
                         (accumulated, entry) -> accumulated.put(entry.getKey(),
                                 Optional.ofNullable(entry.getValue())
-                                    .map(Value::copy)
+                                    .map(Value::clone)
                                     .orElse(null)),
                         HashMap::putAll)));
     }
@@ -54,7 +54,7 @@ public Set<String> keySet() {
     @Override
     public Value getValue(String key) {
         Value value = this.attributes.get(key);
-        return value != null ? value.copy() : null;
+        return value != null ? value.clone() : null;
     }
 
     /**
@@ -70,7 +70,7 @@ public Map<String, Value> asMap() {
                 .collect(HashMap::new,
                         (accumulated, entry) -> accumulated.put(entry.getKey(),
                                 Optional.ofNullable(entry.getValue())
-                                .map(Value::copy)
+                                .map(Value::clone)
                                 .orElse(null)),
                         HashMap::putAll);
     }

src/main/java/dev/openfeature/sdk/Value.java

@@ -20,7 +20,7 @@
 @ToString
 @EqualsAndHashCode
 @SuppressWarnings({"PMD.BeanMembersShouldSerialize", "checkstyle:MissingJavadocType", "checkstyle:NoFinalizer"})
-public class Value {
+public class Value implements Cloneable {
 
     private final Object innerObject;
 
@@ -262,12 +262,13 @@ public Instant asInstant() {
     }
 
     /**
-     * Perform a deep copy of this value.
+     * Perform deep clone of value object.
      *
      * @return Value
      */
     @SneakyThrows
-    protected Value copy() {
+    @Override
+    protected Value clone() {
         if (this.isList()) {
             List<Value> copy = this.asList().stream().map(Value::new).collect(Collectors.toList());
             return new Value(copy);