[CI] Add npm audit to the nightly (#4431)

.circleci/config.yml

@@ -7,6 +7,15 @@ orbs:
   node: circleci/node@4.5.1
   browser-tools: circleci/browser-tools@1.1.3
 jobs:
+  npm-audit:
+    executor: linux
+    steps:
+      - checkout
+      - node/install:
+          install-npm: true
+          node-version: lts/fermium
+      - run: npm install
+      - run: npm audit --audit-level=low
   test:
     parameters:
       node-version:
@@ -92,6 +101,7 @@ workflows:
           name: node14-firefox-nightly
           node-version: lts/fermium
           browser: FirefoxHeadless
+      - npm-audit
     triggers:
       - schedule:
           cron: "0 0 * * *"