Update puppeteer (Chrome) and Node to 12.0
This is updating:
- puppeteer to 1.17.0 which equals Chrome: 76.0.3803.0 src
- node@12 in the underlying image, thus prompting an node-sass and a fsevents update to get compatibility. More context:
- gitlab-ce!28323
- gitlab-ce#63205
Edited by Lukas Eipert