ci: updated script

Author: niveditn

.github/workflows/nodejs.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [8.x, 10.x, 12.x]
+        node-version: [8.x]
 
     steps:
     - uses: actions/checkout@v1
@@ -19,8 +19,8 @@ jobs:
         node-version: ${{ matrix.node-version }}
     - name: npm install, build, and test
       run: |
-        npm ci
-        npm run build --if-present
-        npm test
+        npm i -g yarn mocha
+        yarn install
+        yarn test
       env:
         CI: true