Bump syntax_tree from 6.2.0 to 6.3.0

Bumps [syntax_tree](https://github.com/kddnewton/syntax_tree) from 6.2.0 to 6.3.0.
- [Changelog](https://github.com/ruby-syntax-tree/syntax_tree/blob/main/CHANGELOG.md)
- [Commits](ruby-syntax-tree/syntax_tree@v6.2.0...v6.3.0)

---
updated-dependencies:
- dependency-name: syntax_tree
  dependency-version: 6.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -8,7 +8,7 @@ GEM
     rake (13.3.0)
     rexml (3.3.9)
     rouge (4.5.2)
-    syntax_tree (6.2.0)
+    syntax_tree (6.3.0)
       prettier_print (>= 1.2.0)
     test-unit (3.7.0)
       power_assert