Building a NodeJS app for multiple node versions with GitHub actions and report test results to Coveralls.

git-build-nodejs-multi-version-coveralls.yml

# save as ./github/workflows/git-ci-build.yml
# make sure that 'test-coverage' generates the coverage reports (lcov)

name: git-ci-build

on:
  [push]

jobs:
  build:

    runs-on: ubuntu-latest

    strategy:
      matrix:
        node-version: [12.x, 14.x]

    steps:
    - uses: actions/checkout@v2
    - uses: actions/setup-node@v1
      with:
        node-version: ${{ matrix.node-version }}
    - run: npm ci
    - run: npm run test-coverage
    - name: Coveralls
      uses: coverallsapp/github-action@master
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}