Fastapi-efficient-sql

Added
- Add new parameter `assign_field_dict` to `update_json_field`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/b75a90ff9016b9c528673505d3f91e36dde9e3b3)

Improved
- Switch to `CursorHandler.sum_row_cnt` in `BaseManager.insert_into_select`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/81db3bfd9081b7d30480dff6ed8b2ca8bdda7ac7)

Fixed
- Join on multiple columns in `SQLizer.bulk_update_from_dicts`.[Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/b27401139aa30ef403e81129dd1a39613f5b19ab)

Improved
- Wrap table name with backticks.[Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/3eb6ca04469b075475fbb4b0569724f6c2c61490)
- Enable keyword-only arguments for the main methods.[Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/75508c4b10cd968b0fc8ff893b50a7751cba86a6)

Fixed
- Don't modify params of `BaseManager.create_from_dict` in place.

Added
- Add new parameter `merge_fields` to `bulk_update_from_dicts`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/a823e52f2f6fab73264cf00a157481a7ddf5d9dc)
- Add new parameter `merge_fields` to `upsert_on_duplicate`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/186abe015e2161a8c04becffe52a1bd7853f9dfe)

Improved
- Allow passing `upsert_fields` with None to `upsert_on_duplicate`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/2991b03f31d24bcb85f7a2887a6f9b792486de9c)

Added
- New function `convert_dicts`, and use in `CursorHandler`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/5d2494c3762cb869932d9da870fefd754c586efb)
- Import `escape_string` from `Tortoise-ORM`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/f00356744073ecf6de358a0fc7c1d8d2173445a0)

Added
- New method `select_one_record` of `BaseManager`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/commit/fc77cdf83f1ec53a1ed5fbef9573717d5ce5843f)
- New parameter `index` of `SQLizer.select_custom_fields`.

Improved
- Switch virtual environment management to `Poetry`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/pull/3/commits/d18b60ae444236cb4f230e3d8e45bb86761f3646)
- Fix wrong use of `asynctest`. [Here](https://github.com/NightMarcher/fastapi-efficient-sql/pull/3/commits/5763ce8782c9b8d189762b56c8cb85ca2ab1932f)