Bump tools.nrepl and reply versions for vim-fireplace compatibility

I noticed something really strange with vim-boot that I wanted to run by you.

At a high level, error output is not printed when you evaluate things. At a low level, the nrepl response `boot repl` is returning excludes the 'err' key, while the response return by a `lein repl` *includes* it. This is the value vim-fireplace uses to display error messages for failed invocations.

Turns out lein's REPL is "REPL-y 0.3.5, nREPL 0.2.6", while boot's is "REPL-y 0.3.4, nREPL 0.2.4".

There seem to be enough subtle differences between the versions, that vim-fireplace does not correctly output error messages without upgrading them.