feat: Add options 'one_of' and 'none_of' for filters and validators

[andekande]

Add options 'one_of' and 'none_of'.
Support in filters payload, author, and in action lastComment to filter comments authors.
Usage Example:

    version: 2
    mergeable:
      - when: issue_comment.*
        name: "Merge pull requests when requested via comment"
        filter:
          - do: payload
            sender:
              login:
                must_exclude:
                  regex: '\[bot\]$'
                none_of: ['@author']
        validate:
          - do: lastComment
            must_include:
              regex: 'merge$'
              message: 'Comment "merge" detected, going to merge the PR.'
            comment_author:
              one_of: ['@org/product-owners-team']
              none_of: ['@author', 'shady-product-owner']
        pass:
          - do: merge
            merge_method: "squash"

[andekande]

@shine2lay something went wrong with the master merge - i am having a look right now

[andekande]

@shine2lay resolved, all green

[andekande]

With all these additions the docu site at https://mergeable.readthedocs.io could benefit of an update.
Seems not to be automated on a release...

[github-actions]

🎉 This PR is included in version 2.21.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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