v0.7.2 dbt_klaviyo

PR #38 includes the following updates:

Bug Fixes

• Removes not_null tests for person_id from int_klaviyo__person_metrics and klaviyo__person_campaign_flow. This is because Klaviyo can record events with deactivated profiles, resulting in null person_ids. Therefore models built off of tables with event-based grains may have null person_ids.

Full Changelog: v0.7.1...v0.7.2