Refactoring

Signed-off-by: Manoel Campos <manoelcampos@gmail.com>

Author: manoelcampos

src/main/java/com/manoelcampos/randomorg/RandomOrgClient.java

@@ -28,7 +28,7 @@
  */
 public class RandomOrgClient {
     public static final String APIKEY_ENV_VAR_NAME = "RANDOM_ORG_API_KEY";
-    public static final String JSONRPC_VERSION = "2.0";
+    static final String JSONRPC_VERSION = "2.0";
     private final String API_KEY;
     private final HttpClient client;
     private final ObjectMapper objectMapper;