Merge pull request #329 from ruby-i18n/dependabot/bundler/test-unit-3.7.0

Bump test-unit from 3.6.8 to 3.7.0

Author: movermeyer

Gemfile.lock

@@ -127,7 +127,7 @@ GEM
     rubyzip (2.4.1)
     semver2 (3.4.2)
     stringio (3.1.7)
-    test-unit (3.6.8)
+    test-unit (3.7.0)
       power_assert
     thor (1.4.0)
     thread_safe (0.3.6)