Gulp watch crashes after composer require

[NielsdeBlaauw]

When watching in one terminal and executing a composer require in another the gulp process crashes with the following message:

fs.js:952
  return binding.readdir(pathModule._makeLong(path), options.encoding);
                 ^

Error: ENOENT: no such file or directory, scandir '/Volumes/data/content/data/projects/shop/www/wordpress-default/public_html/wp-content/themes/playground/vendor/composer/8f6bcb54/'
    at Error (native)
    at Object.fs.readdirSync (fs.js:952:18)
    at Gaze._addToWatched (/Volumes/data/content/data/projects/shop/www/wordpress-default/public_html/wp-content/themes/playground/development/node_modules/gulp/node_modules/gaze/lib/gaze.js:274:22)
    at Gaze._internalAdd (/Volumes/data/content/data/projects/shop/www/wordpress-default/public_html/wp-content/themes/playground/development/node_modules/gulp/node_modules/gaze/lib/gaze.js:191:10)
    at /Volumes/data/content/data/projects/shop/www/wordpress-default/public_html/wp-content/themes/playground/development/node_modules/gulp/node_modules/gaze/lib/gaze.js:400:16
    at Array.forEach (native)
    at /Volumes/data/content/data/projects/shop/www/wordpress-default/public_html/wp-content/themes/playground/development/node_modules/gulp/node_modules/gaze/lib/gaze.js:396:12
    at FSReqWrap.oncomplete (fs.js:123:15)

This can probably be fixed by excluding the /vendor/composer/* directories from the watch wildcard.