chore(deps): bump actions/checkout from v2.2.0 to v2.3.1 (#103)

Bumps [actions/checkout](https://github.com/actions/checkout) from v2.2.0 to v2.3.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/master/CHANGELOG.md)
- [Commits](actions/checkout@v2.2.0...28c7f3d)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
         node-version: [10.x, 12.x, 14.x]
 
     steps:
-    - uses: actions/checkout@v2.2.0
+    - uses: actions/checkout@v2.3.1
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v2.1.0
       with: