v4.2.1 release

[dczulada]

Pull requests into cqm-execution require the following. Submitter and reviewer should :white_check_mark: when done. For items that are not-applicable, note it's not-applicable ("N/A") and :white_check_mark:.

Submitter:

• [ ] This pull request describes why these changes were made.
• [ ] Internal ticket for this PR:
• [ ] Internal ticket links to this PR
• [ ] Code diff has been done and been reviewed
• [ ] Tests are included and test edge cases
• [ ] Tests have been run locally and pass

Reviewer 1:

Name:

• [ ] Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• [ ] The tests appropriately test the new code, including edge cases
• [ ] You have tried to break the code

Reviewer 2:

Name:

• [ ] Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• [ ] The tests appropriately test the new code, including edge cases
• [ ] You have tried to break the code

[dczulada]

@adongare could you provide a review for a 4.2.1 version with the update to the ratio measure calculation.