Bump actions/checkout from 1 to 2.4.0 (#52)

Bumps [actions/checkout](https://github.com/actions/checkout) from 1 to 2.4.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...v2.4.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

.github/workflows/reviewdog.yml

@@ -6,6 +6,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2.4.0
       - name: golangci-lint
         uses: reviewdog/action-golangci-lint@v2

.github/workflows/tests.yml

@@ -24,7 +24,7 @@ jobs:
         go-version: ${{ matrix.go }}
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
+      uses: actions/checkout@v2.4.0
 
     - name: go mod package cache
       uses: actions/cache@v2