What's Changed
* Made the `hook` argument of the `Flow` class required by zenthm in https://github.com/zenthm/dominx/pull/62
* "call" method for the `Flow` class by zenthm in https://github.com/zenthm/dominx/pull/63
* "new" method for the `Stream` class by zenthm in https://github.com/zenthm/dominx/pull/64
* "init" method for the `Stream` class by zenthm in https://github.com/zenthm/dominx/pull/65
**Full Changelog**: https://github.com/zenthm/dominx/compare/v0.3.0b2...v0.3.0b3