What's Changed
- functionality to sum or subtract cols in schema by @AnneONS in #478
- RDRP-1213 add in check file exists before reading csv for good error handling by @AnneONS in #475
- RDRP 1198- setting_with_copy_warning by @woodac in #472
Full Changelog: 2.8.0-release...2.9.0-release