chore(ci): target main and test on node 16

Author: SimenB

.github/workflows/nodejs.yml

@@ -3,11 +3,11 @@ name: Unit tests
 on:
   push:
     branches:
-      - master
+      - main
       - next
   pull_request:
     branches:
-      - master
+      - main
       - next
 
 jobs:
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [10.x, 12.x, 13.x, 14.x]
+        node-version: [10.x, 12.x, 13.x, 14.x, 16.x]
     runs-on: ubuntu-latest
 
     steps: