Syncing changes to .json files

[Virtu4lity]

First of all: Great project that tremendously helped me with the core understanding of some gulp mechanics!

I had the issue that changes to the .json data files weren't automatically synced with the browser. I fixed that by adapting the gulp watch task with an additional watch for .json files, triggering a rebuild and also clearing the cache for the .json files in the pug task as described in the following gulp-data issue. I'm just taking my first steps with gulp but maybe that approach is something worth considering for your project.