install repo root package

Author: David Cavazos

.github/workflows/experimental.yaml

@@ -88,7 +88,9 @@ jobs:
           service_account: [email protected]
           access_token_lifetime: 600s # 10 minutes
       - name: Test ${{ matrix.package }}
-        run: bash .github/scripts/nodejs-test.sh ${{ matrix.package }}
+        run: |
+          npm install
+          bash .github/scripts/nodejs-test.sh ${{ matrix.package }}
         env:
           GOOGLE_SAMPLES_PROJECT: long-door-651