Updating Vulture API usage for newer versions of Vulture

[carlio]

Fixes #689 - just removes the unused 'excludes' keyword and also adapts the line number.

@chocoelho have a quick look if you get time, it seems to work for me

[coveralls]

Coverage decreased (-0.1%) to 80.508% when pulling 4a2b4c7 on bugfix/389-vulture-compatability into e6bb8a3 on develop.

[chocoelho]

Pretty neat @carlio, I'm just missing a case testcase such as the one found in vulture readme:

import os

class Greeter:
    def greet(self):
        print("Hi")

def hello_world():
    message = "Hello, world!"
    greeter = Greeter()
    greet_func = getattr(greeter, "greet")
    greet_func()

if __name__ == "__main__":
    hello_world()

How do you feel about adding it? You can check the tests under tests/tools/bandit, or any other tool in the dirname path, for some ideas on how to approach that.

[chocoelho]

@carlio I'm merging this to release a new patch.
Later on, I'll be adding the test case just to make sure we can detect earlier issues like this.