Bump codecov/codecov-action from 1.5.2 to 2.0.1

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1.5.2 to 2.0.1.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1.5.2...v2.0.1)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -57,7 +57,7 @@ jobs:
         CGO_ENABLED: 1 
       run: go test -v -race -cover -covermode=atomic -coverprofile=coverage.txt ./...
     - name: Upload coverage report to Codecov
-      uses: codecov/codecov-action@v1.5.2
+      uses: codecov/codecov-action@v2.0.1
       with:
         flags: go${{ matrix.go-version }}
         token: ${{ secrets.CODECOV_TOKEN }}