Upgrade nREPL

[cursive-ghost]

The nREPL bundled with Cursive should be upgraded to the new nREPL.

[d-t-w]

Leaving a note for fellow travellers.

Had an issue where an upgrade to Leiningen 2.9.0 caused a conflict with cider/piggieback 0.3.9:

Error loading cider.piggieback: Syntax error compiling at (cider/piggieback.clj:187:3).
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...
...
Caused by: java.lang.RuntimeException: Unable to resolve var: cider.piggieback/wrap-cljs-repl in this context

Since latest Leiningen has ported to nRepl 0.6.0 which in turn is only supported by piggieback 0.4.0.

Bumping to 0.4.0 gives me Cursive REPL errors on start:

Error loading cider.piggieback: Syntax error compiling at (cider/piggieback.clj:1:1).
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...
...
Caused by: java.lang.RuntimeException: Unable to resolve var: cider.piggieback/wrap-cljs-repl in this context

Since piggieback 0.4.0 is not compatible with tools.nrepl anymore.

We have a mixed team of Cursive, Emacs + Cider team so for now I'm remaining on 0.3.9 with Lein 2.9.0 and a broken Lein Repl and working Cursive one.