Bump codecov/codecov-action from 1.3.2 to 2.1.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1.3.2 to 2.1.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1.3.2...v2.1.0)

---
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/ci.yml

@@ -20,7 +20,7 @@ jobs:
         run: |
           dotnet test dropbox-sdk-dotnet/Dropbox.Api.Unit.Tests --collect:"XPlat Code Coverage" -- 'DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.ExcludeByFile=**/Generated/**/*.cs'
       - name: Publish Coverage
-        uses: codecov/codecov-action@v1.3.2
+        uses: codecov/codecov-action@v2.1.0
         if: matrix.os == 'ubuntu-latest'
         with:
           flags: unit
@@ -53,7 +53,7 @@ jobs:
         run: |
           dotnet test dropbox-sdk-dotnet/Dropbox.Api.Integration.Tests --collect:"XPlat Code Coverage" -- 'DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.ExcludeByFile=**/Generated/**/*.cs'
       - name: Publish Coverage
-        uses: codecov/codecov-action@v1.3.2
+        uses: codecov/codecov-action@v2.1.0
         if: matrix.os == 'ubuntu-latest'
         with:
           flags: integration