Update project.clj for Windows
Update project.clj for Windows

In win10, I can't run `lein cljsbulid once` and get a error message.
> 'cljsbuild' is not a task. See 'lein help'.

Here is the [document](https://github.com/emezeske/lein-cljsbuild#basic-configuration)
cswaroop/pepa,bevuta/pepa