Fix other node-version to node_version typo

.github/workflows/nodejs.yml

@@ -9,15 +9,15 @@ jobs:
     
     strategy:
       matrix:
-        node_version: [8, 10, 12]
+        node_version: [9, 10, 11, 12]
         os: [ubuntu-latest, windows-latest, macOS-latest]
 
     steps:
     - uses: actions/checkout@v1
-    - name: Use Node.js ${{ matrix.node-version }}
+    - name: Use Node.js ${{ matrix.node_version }}
       uses: actions/setup-node@v1
       with:
-        node-version: ${{ matrix.node-version }}
+        node_version: ${{ matrix.node_version }}
         
     - name: npm install & test
       run: |