Bump actions/setup-go from v1 to v2.1.3 (#65)

Bumps [actions/setup-go](https://github.com/actions/setup-go) from v1 to v2.1.3.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v1...37335c7)

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

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

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
         go: ['1.14']
     steps:
     - name: Set up Go ${{ matrix.go }}
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v2.1.3
       with:
         go-version: ${{ matrix.go }}