Merge pull request #220 from ruby-syntax-tree/dependabot/bundler/rake-13.1.0

Bump rake from 13.0.6 to 13.1.0

Author: github-actions[bot]

Gemfile.lock

@@ -5,7 +5,7 @@ GEM
       rexml
     power_assert (2.0.3)
     prettier_print (1.2.1)
-    rake (13.0.6)
+    rake (13.1.0)
     rexml (3.2.5)
     rouge (4.2.0)
     syntax_tree (6.2.0)