Merge pull request #8 from ruby-syntax-tree/dependabot/bundler/json-2.6.2

Bump json from 2.6.1 to 2.6.2

Author: github-actions[bot]

Gemfile.lock

@@ -10,7 +10,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     docile (1.4.0)
-    json (2.6.1)
+    json (2.6.2)
     minitest (5.15.0)
     prettier_print (0.1.0)
     rake (13.0.6)