chore(deps): update actions/checkout action to v3

Author: renovate-bot

.github/workflows/main.yml

@@ -15,7 +15,7 @@ jobs:
         node-version: ['12', '14', '16']
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Run tests with ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with: