Add support for operator_type to allow keyword targeting criterion

[jamesy829]

Issue Type: Improvement

Fixes / Relates To: N/A

Changes Included:

• Add operator_type to support keyword targeting criterion
• This is a branch off the master of my fork which fixes the targeting_value #214

Check List:

• [ ] Includes adequate test coverage for changes made.
• [ ] Includes new or updated documentation.
• [ ] Includes new or updated usage examples.

For more information on check list items, please see the Contributors Guide.

[jamesy829]

Hi @smaeda-ks , just wondering if this can be merged in?

[tushdante]

Apologies for the long delay, but thanks for making this change! @jamesy829