Update node-fetch from 2.6.6 to 2.6.7 (#327)

.github/workflows/licensed.yml

@@ -14,6 +14,10 @@ jobs:
     name: Check licenses
     steps:
       - uses: actions/checkout@v2
+      - name: Set Node.js 12.x
+        uses: actions/setup-node@v2
+        with:
+          node-version: 12.x
       - run: npm ci
       - name: Install licensed
         run: |