Add option to ignore certain advisories that have been manually worked around

[f-moya]

bundler-audit has a built in option to ignore certain advisories. This is useful under certain scenarios:

• Manual patches.
• None precise advisories.

The necessity for this came from the following advisory.

GHSA-qh4w-7pw3-p4rp

Where actually bson ~> 1.12.3 has a patch in it for this.
mongodb/bson-ruby@976da32#commitcomment-11529744
qltysh-archive/mongo-ruby-driver@bb544c2

So it became of interest to ignore this particular advisory. This work adds that possibility, like follows.

# .codeclimate.yml
plugins:
  bunlder-audit:
    enabled: true
    config:
      ignore:
        - CVE-xxxx-xxxx

[noelia-lencina]

Nice ⭐ Would it be good to add this to the README?

[f-moya]

@noelia-lencina Nice suggestion, thank you. Done.