Merge pull request #40 from ruby-syntax-tree/dependabot/bundler/test-unit-3.7.2

Bump test-unit from 3.7.0 to 3.7.2

Author: github-actions[bot]

Gemfile.lock

@@ -7,7 +7,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     docile (1.4.0)
-    power_assert (2.0.5)
+    power_assert (3.0.1)
     rake (13.3.1)
     simplecov (0.22.0)
       docile (~> 1.1)
@@ -17,7 +17,7 @@ GEM
     simplecov_json_formatter (0.1.4)
     syntax_tree (6.3.0)
       prettier_print (>= 1.2.0)
-    test-unit (3.7.0)
+    test-unit (3.7.2)
       power_assert
 
 PLATFORMS