Merge pull request #636 from ldapjs/dependabot/github_actions/actions/checkout-v2.3.1

Update actions/checkout requirement to v2.3.1

Author: jsumners

.github/workflows/integration.yml

@@ -22,7 +22,7 @@ jobs:
     #       - 636:636
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
 
       # Hack way to start service since GitHub doesn't integrate with its own services