Add test for --skips flag

[terriko]

The CVE Binary Tool as a --skips flag that allows you to specify a list of checkers to skip. It currently has no test.

Ideally, you should have it scan a file that should have a cve (maybe use one of the short tests in test_scanner.py) and show that it finds something when the flag is not used, and finds nothing when the relevant checker is skipped.

But honestly, just a test to make sure the flag outputs something meaningful and doesn't fail when used would probably be a good start here. You can see some similar tests in test_cli.py.

[Patil2099]

@terriko Can you work on this issue?

[terriko]

@Patil2099 Do you need a test for this for some specific reason? I was going to leave this open for new contributors rather than work on it myself.

[Patil2099]

@terriko I am really sorry. I forgot about it. I will work on it today.

[terriko]

removing hacktoberfest label since the contest is over. This remains available for new contributors to work on!