Create tests on multiple version of node (12, 14, ..)

[bidoubiwa]

For the moment we only make our tests run on node version Ubuntu is using (which is 12).

We should test that our package work on the most popular node versions (i.e: at least 12 and 14)

How

Using dockers containers

your_job:
  runs-on: ubuntu-latest
  container: node:10.9

or

name: Use Node.js ${{ node-version }}
uses: actions/setup-node@v1
  with:
    node-version: ${{ node-version }}

But beware, it happened multiple times that download from node became really slow ([1][2]).

[curquiza]

Closed with #584