Merge pull request #232 from ruby-syntax-tree/dependabot/bundler/simplecov-0.22.0

Bump simplecov from 0.21.2 to 0.22.0

Author: github-actions[bot]

Gemfile.lock

@@ -32,7 +32,7 @@ GEM
     rubocop-ast (1.24.0)
       parser (>= 3.1.1.0)
     ruby-progressbar (1.11.0)
-    simplecov (0.21.2)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)