lib: make NativeModule._cache private
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
- Bootstrap
Following @addaleax suggestion on help, I made the NativeModule._cache totally private to prevent any future tempering with it.
I have not found any documentation nor test regarding this part of code, so I did not update any.