[Tests] test on multiple node versions

.github/workflows/node-pretest.yml

@@ -0,0 +1,16 @@
+name: 'Tests: pretest/posttest'
+
+on: [pull_request, push]
+
+jobs:
+  pretest:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ljharb/actions/node/run@main
+        name: 'npm install && npm run pretest'
+        with:
+          node-version: 'lts/*'
+          use-npm-ci: true
+          command: 'pretest'

.github/workflows/node.yml

@@ -0,0 +1,39 @@
+name: 'Tests: node.js'
+
+on: [pull_request, push]
+
+jobs:
+  matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      latest: ${{ steps.set-matrix.outputs.requireds }}
+    steps:
+      - uses: ljharb/actions/node/matrix@main
+        id: set-matrix
+        with:
+          type: 'majors'
+          preset: '>=6'
+
+  latest:
+    needs: [matrix]
+    name: 'latest'
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix: ${{ fromJson(needs.matrix.outputs.latest) }}
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ljharb/actions/node/run@main
+        name: 'npm ci && npm run tests-only'
+        with:
+          node-version: ${{ matrix.node-version }}
+          use-npm-ci: true
+          command: 'tests-only'
+
+  node:
+    name: 'node'
+    needs: [latest]
+    runs-on: ubuntu-latest
+    steps:
+      - run: 'echo tests completed'