chore: add node:16 to the test matrix

.github/workflows/publish.yml

@@ -3,7 +3,7 @@ on:
   pull_request:
     branches: [main]
     types: [closed]
-    
+
 jobs:
   publish_to_npm:
     name: Publish to NPM and GitHub

.github/workflows/release-pr.yml

@@ -10,7 +10,7 @@ jobs:
   create_release_pr:
     name: Create Release PR and Draft Release
     runs-on: ubuntu-latest
-    steps: 
+    steps:
       - name: Checkout Repository
         uses: actions/checkout@v2
         with:
@@ -56,8 +56,8 @@ jobs:
           branch: release/${{ github.event.inputs.version }}
           commit-message: 'chore: ${{ github.event.inputs.version }} release proposal'
           title: 'chore: ${{ github.event.inputs.version }} release proposal'
-          body: | 
+          body: |
             This is an auto-generated release PR. If additional changes need to be incorporated before the release, the CHANGELOG must be updated manually.
-            
+
             Merging this PR will automatically release all packages to NPM.
           delete-branch: true

.github/workflows/unit-test.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        container: ["node:8", "node:10", "node:12", "node:14"]
+        container: ["node:8", "node:10", "node:12", "node:14", "node:16"]
     runs-on: ubuntu-latest
     container:
       image: ${{ matrix.container }}