Diffsync

**WARNING** - 90 inadvertently introduced a breaking API change in DiffSync 1.4.0 through 1.4.2 (101); this change was reverted in 102 for DiffSync 1.4.3 and later. We recommend not using this release, and moving to 1.4.3 instead.

Added

- 53 - Add a new example based on pynautobot and Nautobot REST API
- 59 - Add proper documentation published in Read the doc
- 68 - Cleanup Readme, add link to new documentation site
- 70 - Add `add_or_update()` method to DiffSync class that requires a DiffSyncModel to be passed in and will attempt to add or update an existing object
- 72 - Add core engine section in docs and rename example directories
- 75 - Add support for Structlog v21 in addition to v20.
- 80 - Add support for an existing Diff object to be passed to `sync_to()` & `sync_from()` to prevent another diff from being calculated.
- 81 - Add a new example based on PeeringDB
- 83 - Add support for Python 3.10
- 87 - Add new model flags : `SKIP_UNMATCHED_BOTH`, `SKIP_UNMATCHED_SRC` & `SKIP_UNMATCHED_DST` to match the behavior of the global flags

Changed

- 62 - Update CI Token
- 69 - Replace Travis CI with Github Actions to run unit tests
- 82 - Update lock file with latest versions.
- 90 - Convert list of actions (`create`, `update`, `delete`) to proper Enum

Fixed

- 51 - Update minimum Pydantic version due to security advisory GHSA-5jqp-qgf6-3pvh
- 63 - Fix type in Readme

Added

- 48 - added optional `callback` argument to `diff_from`/`diff_to`/`sync_from`/`sync_to` for use with progress reporting.

Added

- 45 - minimum Python version lowered from 3.7 to 3.6, also now tested against Python 3.9.

Added

- 37 - added `sync_complete` callback, triggered on `sync_from` completion with changes.
- 41 - added `summary` API for Diff and DiffElement objects.
- 44 - added `set_status()` and `get_status()` APIs so that DiffSyncModel implementations can provide details for create/update/delete logging

Changed

- Now requires Pydantic 1.7.2 or later
- 34 - in diff dicts, changed keys `src`/`dst`/`_src`/`_dst` to `-` and `+`
- 43 - `DiffSync.get_by_uids()` now raises `ObjectNotFound` if any of the provided uids cannot be located; `DiffSync.get()` raises `ObjectNotFound` or `ValueError` on failure, instead of returning `None`.

Fixed

- 44 - On CRUD failure, do not generate an extraneous "success" log message in addition to the "failed" message

Initial release