Add support for Node.js v12

[dmohns]

I am unable to install and run face-api.js with Node.js v12.

Steps to reproduce

cd face-api.js

nvm install 12
nvm use 12

npm install

Expected result

face-api.js installs correctly.

Actual result

npm outputs a wall of errors. Most notably build errors with fsevents@1.2.8 and canvas@2.0.1

Environment

Node: v12.2.0
face-api.js: 0.20.0

Comments

After a bit of googling around it looks like indeed fsevents and canvas only add support for Node.js v12 in fsevents@1.2.9 and canvas@2.5.0 respectively, see
fsevents/fsevents#274 and
Automattic/node-canvas#1409

[justadudewhohacks]

Installing the package from npm works fine with node 12.2. Installing the dev dependencies of this repo just doesn't work, because I didn't upgrade them yet to be compatible with node 12.