Merge pull request #581 from sasjs/package-lock-and-node-version

fix: updated package-lock + updated node version for workflow

.github/workflows/build.yml

@@ -13,14 +13,15 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [15.x]
+        node-version: [lts/*]
 
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
+          cache: npm
       - name: Install Dependencies
         run: npm ci
       - name: Check code style