Adding a new option --exit-zero

[liyao001]

Related tools, like pylint and flake8, have similar options to make the program always return zero so that the tool can be easily integrated into continuous integration pipelines.

[RJ722]

Hello @liyao001, one way to introduce Vulture into your CI/CD pipelines without relying on the --exit-zero flag is to call it with || true at the end:

$ vulture . || true

I'm a bit opposed to adding functionality (which we'll need to test and maintain) if the same can be achieved easily by other means.

[jendrikseipp]

I agree with @RJ722.