Checking for python version for the open_binary and files calls

[TedyonGit]

I just wanted to fix the warning "DeprecationWarning".
So i just added a check for python version. If the python version is >= 3.9, then is going to use files call.
If not, is going to fallback to open_binary.

Is not much, but i hope it helps :D

[K0lb3]

Thanks,
and sorry for the late response.

I think that there was a reason I didn't implement this, but I can't recall it anymore.
Maybe I also simply did something wrong at that time, so let's see if the tests pass across different python versions and systems.

[K0lb3]

^ tests failed due to a ruff formatting check