Use boot-cljs-2.0.0

[j1mr10rd4n]

Addresses #81

Also updates the following dependencies in generated projects:

• clojurescipt -> 1.9.562
• boot-reload -> 0.5.1
• boot-http -> 0.8.3

I've manually tested projects generated with the various +options and haven't seen any breakages so far.

[martinklepsch]

Perfect, thanks for these PRs, have been meaning to do this for a while :)