Bump simplecov and codecov (#26)

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>

Gemfile.lock

@@ -8,8 +8,9 @@ GEM
  remote: https://rubygems.org/
  specs:
  byebug (11.1.3)
- codecov (0.6.0)
- simplecov (>= 0.15, < 0.22)
+ codecov (0.2.12)
+ json
+ simplecov
  connection_pool (2.4.1)
  diff-lcs (1.5.0)
  docile (1.4.0)
@@ -18,6 +19,7 @@ GEM
  ruby2_keywords (>= 0.0.4)
  faraday-net_http (3.0.2)
  faraday-rack (1.0.0)
+ json (2.6.3)
  rack (3.0.8)
  rack-test (2.1.0)
  rack (>= 1.3)
@@ -39,7 +41,7 @@ GEM
  rspec-support (~> 3.12.0)
  rspec-support (3.12.0)
  ruby2_keywords (0.0.5)
- simplecov (0.21.2)
+ simplecov (0.22.0)
  docile (~> 1.1)
  simplecov-html (~> 0.11)
  simplecov_json_formatter (~> 0.1)