Bump test-unit from 3.3.3 to 3.3.4

Bumps [test-unit](https://github.com/test-unit/test-unit) from 3.3.3 to 3.3.4.
- [Release notes](https://github.com/test-unit/test-unit/releases)
- [Commits](https://github.com/test-unit/test-unit/compare/3.3.3...3.3.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile

@@ -98,7 +98,7 @@ gem 'roo-xls', '~> 1.1.0'
 
 gem 'whenever', require: false
 
-gem 'test-unit', '~> 3.0'
+gem 'test-unit', '~> 3.3'
 
 # Gems used only for assets and not required
 # in production environments by default.

Gemfile.lock

@@ -674,7 +674,7 @@ GEM
     stripe (4.24.0)
       faraday (~> 0.13)
       net-http-persistent (~> 3.0)
-    test-unit (3.3.3)
+    test-unit (3.3.4)
       power_assert
     thor (0.20.3)
     tilt (1.4.1)
@@ -819,7 +819,7 @@ DEPENDENCIES
   spring (= 1.7.2)
   spring-commands-rspec
   stripe
-  test-unit (~> 3.0)
+  test-unit (~> 3.3)
   timecop
   truncate_html
   turbo-sprockets-rails3