repl: Don't return promise result on eval
repl: Don't return promise result on eval

May sound confusing but right now the repl is used in a synchronous way
and printing huge promises object on every eval is a pain.

cozy-labs/cozy-desktop,nono/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop