run npm test in all js repos

.github/workflows/javascript-tests.yml

@@ -0,0 +1,30 @@
+on: [push]
+
+jobs:
+  list-projects:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.build-matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v2
+      - id: build-mastrix
+        run: echo "::set-output name=matrix::$(ls javascript/ | jq -Rsc 'split("\n")[:-1]')"
+
+  test-javascript:
+    needs: list-projects
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        project: ${{ fromJson(needs.list-projects.outputs.matrix) }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '20.4.0'
+      - name: Run tests
+        run: |
+          set -exuo pipefail
+          npm install
+          npm run test
+        with:
+          working-directory: "javascript/${{ matrix.project }}"