Julia is a very interesting language. I hope the admin's would add support for this. This would help problem solvers who use dynamically typed languages, but mostly get TLE's due to language inefficiencies on problems with tight timing requirements.
hard to find a place to try julia on classical programming problems, so
+1. Julia is already at 1.1.
julia is in usable (1.0) state at codewars and codesignal.
hackerrank also supports julia, unfortunately not for all problems, but you can easily find few in their archived contests section.
Julia: the fourth beta version for the upcoming 1.9 stable series, is now available