Merge pull request #94 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

@@ -16,7 +16,7 @@ GEM
       tilt
     minitest (5.20.0)
     prettier_print (1.2.1)
-    rake (13.0.6)
+    rake (13.1.0)
     simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)