roll back CICD node versioning

.github/workflows/test.yml

@@ -10,6 +10,10 @@ jobs:
   unit:
     name: Unit Test (Node.js v${{ matrix.node }})
     runs-on: ubuntu-latest
+    strategy:
+      matrix: 
+        node: [10, 11, 12, 13]
+
     steps:
       - uses: actions/setup-node@v1
         with:
@@ -22,7 +26,7 @@ jobs:
         with:
           path: node_modules
           key: ${{ runner.os }}-node${{ matrix.code }}-${{ hashFiles('**/package-lock.json') }}
-                
+
       - name: Run test
         run: |
           npm install