Rt

Fixes
- Fixed bug in rest1 (86)

Added
- Added support for specifying custom fields on user creation/edit (82).

Fixes
- Workaround for parsing issues with tickets with only 1 attachment (80), due to probably an upstream bug.

Changes
- Move package metadata and configuration from setup.cfg to pyproject.toml.

Fixes
- Fix edit_user() response handling in case a user_id name (str) was passed instead of a number.

Fixes
- Make sure to include _hyperlinks in history items
- On edit ticket, raise exception if user/queue does not exist

Added
- Add helper method for deleting tickets
- Add tests