Django-clickhouse-backend

- fix [57](https://github.com/jayvynl/django-clickhouse-backend/issues/57).
- Implemente an improved version of inspectdb command.
- Fix update compiler.

- Fix 50 partition by single expression raise TypeError.
- Fix 51 .
- Fix 53 .

- Use [flake8](https://flake8.pycqa.org/) to lint code.
- Add GitHub action which runs tests.
- Add test coverage to ci and send data to coveralls, add coverage badge.
- Fix distributed and replicated table engine tests, add test guide to README.md.

- [Black](https://github.com/psf/black) code style.
- Support [MergeTree settings](https://clickhouse.com/docs/en/engines/table-engines/mergetree-family/mergetree#settings) in creating table.
- Support [distributed DDL](https://clickhouse.com/docs/en/sql-reference/distributed-ddl) and [distributed table](https://clickhouse.com/docs/en/engines/table-engines/special/distributed).
- Support create migration table and run migrating on cluster.
- Fix bug: exception is raised when insert data with expression values.
- Fix bug: exception is raised when alter field from not null to null.
- Support escaping dict data.

- Change `AutoFiled` and `SmallAutoField` to clickhouse `Int64`, so that id worker can generate value for them.
This allows more compatibilities with existing apps such as `django.contrib.auth`.
- `DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'` is no longer a required configuration item.

- Fix reading settings in explain, pull request [13](https://github.com/jayvynl/django-clickhouse-backend/pull/13) by [mahdi-jfri](https://github.com/mahdi-jfri).
- Add toYYYYMM[DD[hhmmss]] functions.
- Fix str(queryset.query) when default database is not clickhouse.
- Fix [bug when save django model instance](https://github.com/jayvynl/django-clickhouse-backend/issues/9).
- Support [clickhouse-driver 0.2.6](https://github.com/mymarilyn/clickhouse-driver), drop support for python3.6.
- Support [Django 4.2](https://docs.djangoproject.com).
- Support [clickhouse JSON type](https://clickhouse.com/docs/en/sql-reference/data-types/json).