update node version

Author: isc-rsingh

.github/workflows/main.yml

@@ -47,7 +47,7 @@ jobs:
     - name: Use Node.js
       uses: actions/setup-node@v1
       with:
-        node-version: 12.x
+        node-version: 14.x
     - run: npm install
     - name: lint
       if: runner.os == 'Linux'