Tortoise-orm

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- Performance fixes from ``pypika>=0.15.6``
- Significant reduction in object creation time

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- Fixed SQLite relative db path and :memory: now also works
- Removed confusing error message for missing db driver dependency
- Added ``aiosqlite`` as a required dependency
- ``execute_script()`` now annotates errors just like ``execute_query()``, to reduce confusion
- Bumped ``aiosqlite>=0.6.0`` for performance fix
- Added ``tortoise.run_async()`` helper function to make smaller scripts easier to run. It cleans up connections automatically.
- SQLite does autocommit by default.

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- Fixed atomic decorator to get connection only on function call

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- Fixed pre-init queryset objects creation

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- Added support for running separate transactions in multidb config

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- Changed default app label from 'models' to None
- Fixed ConfigurationError message for wrong connection name