Drf-dropdown

What's Changed
* Allow undefined context by earthpyy in https://github.com/earthpyy/drf-dropdown/pull/9


**Full Changelog**: https://github.com/earthpyy/drf-dropdown/compare/v0.3.2...v0.4.0

What's Changed
* Check only value and label by earthpyy in https://github.com/earthpyy/drf-dropdown/pull/8


**Full Changelog**: https://github.com/earthpyy/drf-dropdown/compare/v0.3.1...v0.3.2

What's Changed
* Eliminate duplication on dropdown items by earthpyy in https://github.com/earthpyy/drf-dropdown/pull/7


**Full Changelog**: https://github.com/earthpyy/drf-dropdown/compare/v0.3.0...v0.3.1

What's Changed
* Better exception by earthpyy in https://github.com/earthpyy/drf-dropdown/pull/5
* Allow select related by earthpyy in https://github.com/earthpyy/drf-dropdown/pull/6


**Full Changelog**: https://github.com/earthpyy/drf-dropdown/compare/v0.2.5...v0.3.0

**Full Changelog**: https://github.com/earthpyy/drf-dropdown/compare/v0.2.4...v0.2.5