Neat way to call bandit natively in python without relying on the CLI

[sillyfatcat]

Is your feature request related to a problem? Please describe.
I'm trying to integrate Bandit into a python tool that I have but I don't want to shell out or rely on subprocess to call bandit this way:

subprocess.Popen(['bandit', '-r', full_path], stdout=subprocess.PIPE)

Describe the solution you'd like
It would be beneficial if we could do something like:

from bandit import bandit_runner
bandit_runner(path, recursive=True, format='json')

as an example