[fix refactor] Use `watch.watchTree` function
[fix refactor] Use `watch.watchTree` function

We want to listen on all events, so it's better to use `watch.watchTree`
than `watch.createMonitor`.

rakyll/forever,jqk6/forever,ryan321/forever,jotham/forever,JJediny/forever,rbramwell/forever,nguyen-tien-mulodo/forever,jotham/forever,saisai/forever,Jonekee/forever,rakyll/forever,yyx990803/forever,rbramwell/forever,arnabsinha4u/demo-documentation,saisai/forever,ryan321/forever,Jonekee/forever,kethle/forever,yyx990803/forever,vcarrera/forever,foreverjs/forever,jqk6/forever,ContinuumIO/forever,ContinuumIO/forever,vcarrera/forever,foreverjs/forever,nguyen-tien-mulodo/forever,arnabsinha4u/demo-documentation,kethle/forever,JJediny/forever