NullPointerException in set operation of a compoposed json-values lens

[jlcanales]

Version of json-values you are using
json-values version: 8.2.2
JVM version: 11

Describe the bug
When set operation is used on a composed lents, a NullPointerException happens using it over a JsObj where the complete lens path doesn't exist.

To Reproduce
Lens<JsObj, JsObj> calification = JsObj.lens.obj("calification");
Lens<JsObj, Boolean> validated = calification.compose(JsObj.lens.bool("isValidated"));

    JsObj json = validated.set.apply(Boolean.TRUE).apply(JsObj.empty());

The set operation works find when the lens path exists. This is the case:

    Lens<JsObj, JsObj> calification = JsObj.lens.obj("calification");
    Lens<JsObj, Boolean> validated = calification.compose(JsObj.lens.bool("isValidated"));

    JsObj json = validated.set.apply(Boolean.TRUE).apply(JsObj.of("calification", JsObj.empty()));

Expected behavior
Composed lens should works in the same way that a complete path lens. For example:

    Lens<JsObj, Boolean> validated = JsObj.lens.bool(JsPath.path("/calification/isValidated"));
    JsObj json = validated.set.apply(Boolean.TRUE).apply(JsObj.empty());