Bump simplecov from 0.19.1 to 0.21.1 (#513)

Bumps [simplecov](https://github.com/simplecov-ruby/simplecov) from 0.19.1 to 0.21.1.
- [Release notes](https://github.com/simplecov-ruby/simplecov/releases)
- [Changelog](https://github.com/simplecov-ruby/simplecov/blob/main/CHANGELOG.md)
- [Commits](simplecov-ruby/simplecov@v0.19.1...v0.21.1)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -131,7 +131,7 @@ GEM
       actionmailer (>= 5.0)
       devise (>= 4.6)
     diff-lcs (1.4.4)
-    docile (1.3.2)
+    docile (1.3.4)
     dotenv (2.7.6)
     dotenv-rails (2.7.6)
       dotenv (= 2.7.6)
@@ -369,10 +369,12 @@ GEM
     simple_form (5.0.3)
       actionpack (>= 5.0)
       activemodel (>= 5.0)
-    simplecov (0.19.1)
+    simplecov (0.21.1)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.2)
     slop (3.6.0)
     spring (2.1.1)
     spring-watcher-listen (2.0.1)