Plugin built time (skpm-build --watch --run) is too slow after changes in files.
# Current results:
![image](https://user-images.githubusercontent.com/29732328/71741869-09decd00-2e71-11ea-9c78-876013f12867.png)

# The steps that led to these results

1. I wrote a plugin
2. Published it
3. Installed https://github.com/skpm/sketch-module-web-view with a save flag

On the first evening after installing everthing was ok, but the next day, when I was running a command: _npm run start_ , the time between saving the event in a file and running the plugin in sketch was too long, about a minute or longer.

- When I start a new project locally – everthing is fine and everthing works without troubles. 
- **When I clone the project from github – it has the same problem with the built time.**

A link to the plugin repo: [Helpify plugin](https://github.com/Luckyfoxdesign/helpify)

What am I doing wrong? Or what has happened and how to fix it?
