Fix node build action, use only node 12.x

Author: fr0l

.github/workflows/nodejs.yml

@@ -16,16 +16,15 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x]
+        node-version: [12.x]
 
     steps:
     - uses: actions/checkout@v2
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
-    - run: npm ci
-    - run: npm run build --if-present
-    - run: npm test
+    - run: npm install
+    - run: npm run build
       env:
         CI: true