chore(deps-dev): bump simplecov and codecov (#591)

Bumps [simplecov](https://github.com/simplecov-ruby/simplecov) and [codecov](https://github.com/codecov/codecov-ruby). These dependencies needed to be updated together.

Updates `simplecov` from 0.21.2 to 0.22.0
- [Release notes](https://github.com/simplecov-ruby/simplecov/releases)
- [Changelog](https://github.com/simplecov-ruby/simplecov/blob/main/CHANGELOG.md)
- [Commits](simplecov-ruby/simplecov@v0.21.2...v0.22.0)

Updates `codecov` from 0.6.0 to 0.2.12
- [Release notes](https://github.com/codecov/codecov-ruby/releases)
- [Changelog](https://github.com/codecov/codecov-ruby/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-ruby@v0.6.0...v0.2.12)

---
updated-dependencies:
- dependency-name: simplecov
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: codecov
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

fluent-plugin-kubernetes-sumologic/Gemfile.lock

@@ -10,8 +10,9 @@ GEM
   specs:
     addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
-    codecov (0.6.0)
-      simplecov (>= 0.15, < 0.22)
+    codecov (0.2.12)
+      json
+      simplecov
     concurrent-ruby (1.1.10)
     cool.io (1.7.1)
     crack (0.4.5)
@@ -32,6 +33,7 @@ GEM
     hashdiff (1.0.1)
     http_parser.rb (0.8.0)
     httpclient (2.8.3)
+    json (2.6.3)
     msgpack (1.5.1)
     power_assert (2.0.3)
     public_suffix (5.0.3)
@@ -40,7 +42,7 @@ GEM
     serverengine (2.3.2)
       sigdump (~> 0.2.2)
     sigdump (0.2.5)
-    simplecov (0.21.2)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)