With PHP8.3 the `ReflectionProperty->setValue()` method
emits a E_DEPRECATED if a value should be set to a class
and the context is not set as first argument.

For instanciated classes the class needs to be provided,
which is not possible for a static class or property.

The solution for this is to use `null` as first argument
as context object. That avoids the deprecation and keeps
the backward compatibility.

The testing-framework provides a tool to keep and handle
static Framework state, which uses reflection under the
hood and therefore needs the null context for `setValue()`.

Releases: main, 7, 6