chore(ci): add node 16

Author: mjeanroy

.github/workflows/build.yml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       matrix:
         os: [ windows-latest, ubuntu-latest, macos-latest ]
-        node: [ 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ]
+        node: [ 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ]
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1