Fx-crash-sig

* Switch to `pyproject.toml`. (97)
* Deprecate the project. (111)

* Drop support for Python 3.7. (75)
* Add support for Python 3.12. (76)
* Update siggen version requirements.
* Improve README. (56)

* Fix `--verbose` output when frame has no function. (72)

* Switch to github actions for CI. (47)
* Improve documentation.
* Improve `fx-crash-sig` command error output, input handling, etc.
* Add user-agent to symbolication API requests. (13)
* Fix `crashing_thread` handling. (12)
* Add `--version` flag and version info.
* Add `reason` to symbolication output structure so signature generation can
use it for OOM determination. (37)
* Fix dependency constraints and remove ujson requirement. (58)
* Add Code of Conduct. (57)
* Rework testing to use tox and environments. (48)
* Lint and reformat code using flake8 and black. (17)
* Drop support for Python 3.6. (43)
* Add support for Python 3.10. (41)
* Add support for Python 3.11. (42)

* update symbolication API URL to symbolication.services.mozilla.com