remove node 12, add node 16

Author: StarpTech

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        nodejs: [12, 14]
+        nodejs: [14, 16]
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-node@v2