v1.0.b5

⚠️ Breaking Changes ⚠️

• Make component fields explicit (#109) @AdamHillier

🎉 Features

• Add allow_missing as a flag to Fields and ComponentFields. (#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

⬆️ Dependencies

• Update pytype requirement from <2020.2.0,>=2019.10.17 to >=2019.10.17,<2020.3.0 (#111) @dependabot-preview