Rororo

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**Fixes:**

- Fix type annotation for ``add_resource_context`` context manager

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**Features:**

- Ensure Python 3.8 support. Move ``2.0.0`` release to beta phase

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**Features:**

- Parse API Key & HTTP security data for OpenAPI operation
- Allow to remove root handlers on setting up logging config

**Other:**

- Cover ``rororo.openapi`` with non-machine docs
- Provide another example on using OpenAPI schema inside aiohttp.web application

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**Features:**

- Support ``type: array`` request bodies as well
- Allow to validate responses against OpenAPI schema

**Other:**

- Do not directly depend on ``jsonschema``

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**Fixes:**

- Depend on ``aiohttp>=3.5,<4.0``

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**Features:**

- Add ``rororo.get_openapi_context`` shortcut

**Other:**

- Update API docs for ``rororo.openapi`` public functions & classes