Sqlite-database

Just a silly release that fixes a issue.

* This fixed where `allow_null` doesn't return

What's Changed
* fix some docs by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/12
* Refining The Readme file by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/13
* Refining Usage.md and Features.md by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/14
* Change `.select_one` to not returns `None` by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/15
* Fix function bugs on multiple values. by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/18
* Allow nullable on BuilderColumn by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/19
* added benchmark and helpers by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/20
* Fixed 17 by RimuEirnarn


**Full Changelog**: https://github.com/RimuEirnarn/sqlite_database/compare/v0.4.2...v0.4.3

What's Changed

* Fix row value misused when used 'only' params. by RimuEirnarn in https://github.com/RimuEirnarn/sqlite_database/pull/11


**Full Changelog**: https://github.com/RimuEirnarn/sqlite_database/compare/v0.4.1...v0.4.2

Nothing interesting, just cleaning some embarrassing stuff.

Changelog

1. **added** check if database is closed
2. **removed** config for Table and Database
3. **added** function support.

**Full Changelog**: https://github.com/RimuEirnarn/sqlite_database/compare/v0.3.0...v0.4.0

1. Add query building cache
2. Add config class
3. Add crunch/squash option for `select*`

**Full Changelog**: https://github.com/RimuEirnarn/sqlite_database/compare/v0.2.1...v0.3.0