What's Changed
* Fix pydantic validate and pickle for tagged union by denghz in https://github.com/dbrattli/Expression/pull/207
* Added Result or_else methods by brendanmaguire in https://github.com/dbrattli/Expression/pull/226
* Added Result merge method by brendanmaguire in https://github.com/dbrattli/Expression/pull/225
* Added Result filter methods by brendanmaguire in https://github.com/dbrattli/Expression/pull/224
**Full Changelog**: https://github.com/dbrattli/Expression/compare/v5.1.0...v5.2.0