Swagger-ui redirect index-path func
Add type hints

Checked with `lein check` and added type hints where warnings where
shown.
Refactor path-params function
Unused :use
Missplaced docstring & deprecated middleware

`wrap-file-info` middleware is deprecated but `wrap-content-type` and
`wrap-not-modified` provide same functionality together.
Removed servlet-context type hint

Importing servlet-context would require depenency on servlet-api on
envinroments where it's not used (e.g. http-kit).
Merge branch 'feature/type-hints'