Merge pull request #304 from macbre/node.js-16

Test using Node.js 16.x

.github/workflows/nodejs.yml

@@ -1,6 +1,5 @@
 # This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
-
 name: Node.js CI
 
 on:
@@ -18,12 +17,16 @@ jobs:
         - "12.x"
         - "14.x"
         - "15.x"
+        - "16.x"
 
     steps:
     - uses: actions/checkout@v2
+
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@master
       with:
+        cache: npm
         node-version: ${{ matrix.node-version }}
+
     - run: npm ci
     - run: npm test