update CI node versions

Author: Nick-Mazuk

.github/workflows/ci.yml

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