Multiple connections, more config, optimisations, refactoring

So much to cover! I couldn't release earlier and smaller really because the multiple connections required a LOT of coordinated refactoring, I hope you enjoy these changes and improvements!

• Update Aniseed with a few small improvements.
• Simplify how relative file root resolving works and disable it by default (you'll have to see :help conjure for more on this).
• A huge amount of internal refactoring and tidying.
• Support for multiple connections for any client based on any criteria such as your current working directory or the day of the week. It's entirely up to you! See :helpgrep ConjureClientState for more information.
• Disabled advanced CLJS completion until it's fixed upstream (thanks, @freddy! #107).
• Use test-vars over test for Clojure (thanks, @b-ryan! #106).
• Optimise completion a little for HUGE lists.
• README and doc tweaks.
• Internal testing deps.edn cleanup by @penryu, thanks!
• Allow toggling of line wrapping in the log and HUD (see :helpgrep conjure#log#wrap).

And I think that's everything worth mentioning! I have a LOT more on my todo list but hopefully I can release them a little more incrementally now this big multi-connection feature is out.

Have a wonderful weekend!