automate publishing to npmjs

Author: adrianpraja

.github/workflows/test.yml

@@ -58,10 +58,10 @@ jobs:
         runs-on: ubuntu-latest
         steps:
         - uses: actions/checkout@v2
-        - name: Use Node.js 10
+        - name: Use Node.js 12
           uses: actions/setup-node@v1
           with:
-            node-version: 10
+            node-version: 12
 
         - run: npm install
         - run: npm test