gitlab4j#1280 Use PropertyNamingStrategies instead of PropertyNamingStrategy

* the latter was deprecated as of 2.12 and removed in jackson-databind 2.20

Author: Federico Grilli

src/main/java/org/gitlab4j/api/utils/JacksonJson.java

@@ -33,7 +33,7 @@
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
-import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.module.SimpleModule;
@@ -59,7 +59,7 @@ public JacksonJson() {
         objectMapper = new ObjectMapper();
 
         objectMapper.setSerializationInclusion(Include.NON_NULL);
-        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
+        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE);
 
         objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
         objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
@@ -81,7 +81,7 @@ public ObjectMapper getContext(Class<?> objectType) {
 
     /**
      * Gets the ObjectMapper contained by this instance.
-     * 
+     *
      * @return the ObjectMapper contained by this instance
      */
     public ObjectMapper getObjectMapper() {
@@ -230,7 +230,7 @@ public <T> Map<String, T> unmarshalMap(Class<T> returnType, String jsonData) thr
 
     /**
      * Marshals the supplied object out as a formatted JSON string.
-     * 
+     *
      * @param <T> the generics type for the provided object
      * @param object the object to output as a JSON string
      * @return a String containing the JSON for the specified object
@@ -349,7 +349,7 @@ public List<User> deserialize(JsonParser jsonParser, DeserializationContext cont
     private static class JacksonJsonSingletonHelper {
         private static final JacksonJson JACKSON_JSON = new JacksonJson();
         static {
-            JACKSON_JSON.objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CAMEL_CASE);
+            JACKSON_JSON.objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.LOWER_CAMEL_CASE);
             JACKSON_JSON.objectMapper.setSerializationInclusion(Include.ALWAYS);
         }
     }