Sqlmigrately

Commits
- add documentation for column_diff_callback method ([blacksuan19](https://github.com/Blacksuan19/sqlmigrately/commit/547c2c4bf44af7220bbb5cded692eca9fab2a44a))
- expose all utils methods ([blacksuan19](https://github.com/Blacksuan19/sqlmigrately/commit/d337ca475e4dd12e42cc74cc2e60d14bfd1f79ae))
- a1edafe: test.ipynb: add usage of callback (blacksuan19)
- 02631cb: Bump version 0.1.1 -> 0.1.2 (blacksuan19)

Commits
- utils: manually commit transaction ([blacksuan19](https://github.com/Blacksuan19/sqlmigrately/commit/f489fe2e7534449359ed6525087826d6c2e934d7))
- f2a8f50: Bump version 0.1.0 -> 0.1.1 (blacksuan19)

Commits
- expose ColumnDiff data structure ([blacksuan19](https://github.com/Blacksuan19/sqlmigrately/commit/e91e425b1698a33aa3f358d8c1e290b9381365ff))
- main: implement column diff callback to allow custom logging ([blacksuan19](https://github.com/Blacksuan19/sqlmigrately/commit/fd65ce9932622cbb2a4542233ce7e29f47cb68ed))
- 0645952: Bump version 0.0.7 -> 0.1.0 (blacksuan19)

Commits
- utils: use begin() on connection object to enable auto commit ([blacksuan19](https://github.com/Blacksuan19/sqlmigrately/commit/db51705c4556bd03d4470954ad11b9fa77022cc3))
- 2acd382: Bump version 0.0.6 -> 0.0.7 (blacksuan19)

Commits
- d021c55: Bump version 0.0.5 -> 0.0.6 (blacksuan19)