ci: test on two latest LTS versions of Node (#496)

.github/workflows/pr.yml

@@ -37,7 +37,7 @@ jobs:
     name: "Build"
     strategy:
       matrix:
-        node-version: [14, 15]
+        node-version: [14, 16]
         os: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
@@ -83,3 +83,4 @@ jobs:
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
           sync-labels: true
+        continue-on-error: true