ci: test with Node.js 17.x (#3274)

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [12.x, 14.x, 16.x, 17.x]
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2

.github/workflows/companion.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [10.20.1, 12.x, 14.x, 16.x]
+        node-version: [10.20.1, 12.x, 14.x, 16.x, 17.x]
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2