Improvements
- Django 3.0
- "Filtering Rules" dialog, an option to require HTTP POST (#297)
- Show Healthchecks version in Django admin header (#306)
- Added JSON endpoint for Shields.io (#304)
senddeletionnotices
command skips profiles with recent last_active_date- The "Update Check" API call can update check's description (#311)
Bug Fixes
- Don't set CSRF cookie on first visit. Signup is exempt from CSRF protection
- Fix List-Unsubscribe email header value: add angle brackets
- Unsubscribe links serve a form, and require HTTP POST to actually unsubscribe
- For webhook integration, validate each header line separately
- Fix "Send Test Notification" for webhooks that only fire on checks going up
- Don't allow adding webhook integrations with both URLs blank
- Don't allow adding email integrations with both "up" and "down" unchecked