:warning: Breaking Changes :warning:
* Make component fields explicit (109) AdamHillier
:tada: Features
* Add `allow_missing` as a flag to `Field`s and `ComponentField`s. (115) AdamHillier
* Raise an error if a component is configured with an unknown key. (113) AdamHillier
* Add a post-configure hook for components. Closes 89. (114) AdamHillier
* Support `factory` components (110) AdamHillier
:arrow_up: Dependencies
* Update pytype requirement from <2020.2.0,>=2019.10.17 to >=2019.10.17,<2020.3.0 (111) dependabot-preview