FYI there was also this proposal of a google summer code there https://julialang.org/soc/projects/general.html#middlewares-for-common-web-application-chores-in-muxjl
Middlewares for common web application chores in Mux.jl
Implementation of mid-level features - specifically routing, load-balancing,
cookie/session handling, and authentication - in Mux.jl. The implementation
should be extensible enough to allow easy interfacing with different kinds of
caching, databases or authentication backends.
(See Clojure/Ring for inspiration).Expected Results: Improvements to the Mux.jl package.
Required Skills: Experience with web development.
Recommended Skills: Knowledge of various web frameworks, especially the design decisions and tradeoffs behind them.
Mentors: Mike Innes
It seems it wasn’t allocated this year in the recently published gsoc 2018 student list
I don’t know if there was (or will be) any others evolutions