falcon_swagger_ui/resources.py: Falcon 3.0.0b1 fix (#21)
falcon_swagger_ui/resources.py: Falcon 3.0.0b1 fix (#21)

Falcon 3.0.0b1 was released and resp.body is deprecated:

    falcon.util.deprecation.DeprecatedWarning: Call to deprecated property body. Please use text instead.

See: https://falcon.readthedocs.io/en/3.0.0b1/changes/3.0.0.html
rdidyk/falcon-swagger-ui,rdidyk/falcon-swagger-ui