go generate command to update swaggerui

[fabiante]

This project makes use of SwaggerUI.

We have once manually downloaded the prebuild assets which are embedded in this project.

It would be interesting to have a go generate command which would update these assets and allow us to quickly update to the latest swagger ui versions.

• download the latest / desired version from the dist dir: https://github.com/swagger-api/swagger-ui/tree/master/dist
• replace the local dist directory