ci: GitHub Actions Test on node: [12.x, 14.x, 16.x] (#2439)

Author: cclauss

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       max-parallel: 15
       matrix:
-        node: [10.x, 12.x, 14.x]
+        node: [12.x, 14.x, 16.x]
         python: [3.6, 3.8, 3.9]
         os: [macos-latest, ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}