Aiohttp-apispec

- `prefix` and `in_place` params. [commit 5aec5e1](https://github.com/maximdanilchenko/aiohttp-apispec/commit/5aec5e102543f4013053d010636bc0c38525cd06)
- Specified read encoding to allow pip install on Windows. [commit be3c071](https://github.com/maximdanilchenko/aiohttp-apispec/commit/be3c0716474cec2f450ca3c7a04d0e66e30228f1)
- Compatibility with `apispec` 3.0 and drops support of <3.0. Closes 63. [commit 4e76b52](https://github.com/maximdanilchenko/aiohttp-apispec/commit/4e76b52a93f723c96221e75ed09e6b50f34ee545)
- Compatibility with `marshmallow` 3.0 in tests.

- Closes 50. Use `apispec.core.VALID_METHODS_OPENAPI` for valid http methods list.
- Closes 55. Support non-dict objects returning from validating.
- `match_info` support for `validation_middlware` middlware in views without `request_schema` decorator

- [custom-error-handling](https://github.com/maximdanilchenko/aiohttp-apispec#custom-error-handling)
- swagger-ui static files update to latest version

- Call `open()` with string instead of `Path`, for compatibility with python 3.5 (45).

- Issue with paths for CSS and JS static files in SwaggerUI (both 42 and 43)

- SwaggerUI 3.0 support out of the box!
- `setup_aiohttp_apispec` default `url` param changed to `/api/docs/swagger.json`