Bump syntax_tree from 5.3.0 to 6.0.0

Bumps [syntax_tree](https://github.com/kddnewton/syntax_tree) from 5.3.0 to 6.0.0.
- [Release notes](https://github.com/kddnewton/syntax_tree/releases)
- [Changelog](https://github.com/ruby-syntax-tree/syntax_tree/blob/main/CHANGELOG.md)
- [Commits](ruby-syntax-tree/syntax_tree@v5.3.0...v6.0.0)

---
updated-dependencies:
- dependency-name: syntax_tree
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] 

Author: dependabot[bot]

Gemfile.lock

@@ -18,7 +18,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
-    syntax_tree (5.3.0)
+    syntax_tree (6.0.0)
       prettier_print (>= 1.2.0)
 
 PLATFORMS