NullPointerException during programatically configuring the library

[milanov]

Describe the bug
The PropertyUtil#getYamlValue throws a null pointer exception if there is no native-query configuration in the yaml file:

Map<String, String> map = (HashMap<String, String>) obj.get("native-query");
return Optional.ofNullable(map.get(propertyName.replace("native-query.", "")));

To Reproduce
Try to define a class to configure a class that extends NativeQueryConfig, but don't include any native-query configuration in an existing yaml file.

Expected behavior
It should work without having to include any configuration in the properties file.

[gasparbarancelli]

I released a new version of the library, update it!