Revert "TO REVERT: Deleting other tests."

This reverts commit a0c57b9c11.

.github/workflows/lint-package-lock.yml

@@ -0,0 +1,28 @@
+name: "Lint"
+
+# any branch is useful for testing before a PR is submitted
+on: [push, pull_request]
+
+jobs:
+  lint-package-lock:
+    # run on pushes to any branch
+    # run on PRs from external forks
+    if: |
+         (github.event_name != 'pull_request')
+         || (github.event.pull_request.head.repo.id != github.event.pull_request.base.repo.id)
+    name: package-lock.json
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - uses: actions/setup-node@v2
+      with:
+        node-version: 12
+
+    - name: Install lockfile-lint
+      run: npm install lockfile-lint
+
+    - name: Run lockfile-lint on package-lock.json
+      run: npx lockfile-lint --path src/package-lock.json --validate-https --allowed-hosts npm