Ensure that object class contains path from root namespace

[pionl]

• bug fix
• BC break? no

Hi,

at first thank you for the package.

I've found that created objects in default parameters in methods does not contain valid class path (it should be from a root, currently uses namespace of the file which is incorrect).

This PR ensures that the object class always uses root path namespace.

Here is current "broken" expectation in my test:

• test result
• implementation
• expected file result

I'm using $assertMethod = (new Factory())->fromMethodReflection($method);

Also I've noticed a deprecated usage of (string) reflectionType (it is deprecated since 7.1). I've currently implemented possible alternative solution (should cover everything I've found):

• implementation
• All possible variants I've found are defined here.

If you are interested I can contribute it to the factory (so a I can later us it?).

Have a great day,

[dg]

Thanks