gulp watch - sometimes new files not injected in index.html

[gruppjo]

Maybe related to gulpjs/gulp#651
Which will also fix #146

I did some debugging and found out that the problem occurs when running the task inject-all. https://github.com/mwaylabs/generator-m/blob/master/app/templates/gulp_tasks/injecting.js#L16
Here's what happens:

1. This task runs the wiredep task as its dependency which also manipulates the index.html.
2. Since wiredep is running first, it triggers the changed event on the index.html which results in a livereload.
3. Apparently when the inject-all task runs itself after wiredep has finished, no new change event is triggered.

Thus the index.html does contain the new file, but no livereload is performed and the new files is missing in the index.html.

I created a new issue with gulp gulpjs/gulp#1074

[yocontra]

FYI we have a new file watcher in gulp 4.0 so this can be closed

[gruppjo]

closing, since the issue is outdated. Please feel free to comment, when you feel otherwise.