Bump codecov from 0.2.0 to 0.2.1

Bumps [codecov](https://github.com/codecov/codecov-ruby) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/codecov/codecov-ruby/releases)
- [Changelog](https://github.com/codecov/codecov-ruby/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-ruby@v0.2.0...v0.2.1)

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

Gemfile.lock

@@ -82,7 +82,7 @@ GEM
       ci_reporter (~> 2.0)
       test-unit (>= 2.5.5, < 4.0)
     climate_control (0.2.0)
-    codecov (0.2.0)
+    codecov (0.2.1)
       colorize
       json
       simplecov