Make cider-map-repls configurable

[robert-stuttaford]

Is your feature request related to a problem? Please describe.

When I eval forms in a .cljc-backed buffer with both a clj and cljs repl connected, the form is evaluated in both. Sometimes I am evaluating forms that only one can use. I'd like to switch to clj-only or cljs-only or back to auto arbitrarily.

Describe the solution you'd like

To be able to control :auto here when in a .cljc-backed buffer.

cider/cider-eval.el

Line 1514 in 90561f1

(cider-map-repls :auto

Describe alternatives you've considered

I can handle this OK with clj-only; just don't connect a cljs repl. But I always want both repls connected when working with cljs, and so I have no solution for this there.

[vemv]

This was implemented in #3387

It's available in CIDER master (Melpa non- Stable). Or CIDER 1.8.0 which we plan to release soon!